Sean O’Neil
United States
Coach
Tennis coach and instructor contributing to stroke analysis and teaching methodology.
Tennis coach and instructor.
Video Library (23 videos)
| Name |
FPS |
Duration |
On Court with Dr. Brian Gordon (1 of 92)
Sean O'Neil's stroke mechanics animation from a central court position, filmed from a side angle. The sequence clearly depicts how the wrist lags behind the racquet during the forward swing and then pronates through contact to transfer energy efficiently into the ball.
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17.3s |
Coco Gauff’s Second Serve: A Technical Analysis (1 of 7)
Sean O'Neil’s serve analysis animation for Coco Gauff is presented from a neutral, instructional perspective, filmed from a mixed side and rear composite angle. The shoulder line rotation relative to the hips and the timing of the trunk uncoil into contact are clearly broken down frame by frame, making the degree of upper-body coil and its release within the kinetic chain especially easy to compare across positions.
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8.8s |
On Court with Dr. Brian Gordon (2 of 92)
Sean O'Neil's stroke animation from a neutral court position, filmed from a side biomechanical analysis angle. His follow-through is traced through multiple frames, clearly showing the progression of weight transfer onto the front foot and the racket's path as he returns to a ready position.
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6.3s |
Coco Gauff’s Second Serve: A Technical Analysis (2 of 7)
Sean O'Neil’s serve toss demonstration from a neutral court position, filmed from a side angle. His relaxed continental grip keeps the wrist relatively quiet, with minimal early cocking so the hand rises in a straight line and the wrist only subtly extends as the ball leaves the fingertips.
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11.7s |
Brian Gordon and the 3D Markerless Revolution (2 of 4)
Sean O'Neil's simulated strokes from a neutral court position, filmed from a 3D animation perspective. His hips and legs are modeled with clear knee flexion into the loading phase and a pronounced upward leg drive that sequences into hip rotation.
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3.5s |
Donna Vekic's Serve Vs. Coco Gauff's (1 of 6)
Sean O'Neil's first serve from the deuce court, filmed from a rear angle. His feet load in a platform stance with a clear knee bend before he drives up, then he lands slightly inside the court with a small adjustment step to recover toward the center.
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0.5s |
On Court with Dr. Brian Gordon (3 of 92)
Sean O'Neil's animated stroke biomechanics sequence from a neutral court position, filmed from a mixed side and rear instructional angle. The hips and legs are shown cycling through exaggerated knee flexion and extension with clear hip rotation timing relative to leg drive, making it easy to see how lower-body loading precedes the upper-body motion.
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8.5s |
Coco Gauff’s Second Serve: A Technical Analysis (3 of 7)
Sean O'Neil's serve motion with a pronounced back bend, filmed from a side angle. His follow-through leads his hitting arm up and across his body while his weight drives into the court, bringing him quickly back toward a neutral ready position.
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12s |
Brian Gordon and the 3D Markerless Revolution (3 of 4)
Sean O'Neil’s stroke analysis animation is presented from a neutral, instructional camera perspective. His footwork and stance are broken down into clear positional frames, with distinct depictions of split-step landing, weight transfer through an athletic base, and recovery alignment relative to the intended shot direction.
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26.2s |
Donna Vekic's Serve Vs. Coco Gauff's (2 of 6)
Sean O'Neil's first serve from the deuce side, filmed from a rear court-level angle. His continental grip is clearly visible with a relaxed hand, and you can see pronounced wrist pronation through contact as the racquet edge leads and then turns outward toward the target.
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0.4s |
Donna Vekic's Serve Vs. Coco Gauff's (3 of 6)
Sean O'Neil's first serve from the deuce side, filmed from a rear court-level angle. At contact his racket face is slightly tilted forward with the ball struck just above full extension, and the racket head accelerates steeply up the back of the ball along a pronounced upward swing path.
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1.5s |
On Court with Dr. Brian Gordon (4 of 92)
Sean O'Neil's forehand from the center of the baseline, filmed from a side CourtLevel angle. His shoulders rotate well past perpendicular to the net on the unit turn, then his trunk uncoils ahead of the arm swing, making the sequential opening of hips, torso, and shoulders easy to distinguish.
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16.1s |
Coco Gauff’s Second Serve: A Technical Analysis (4 of 7)
Sean O'Neil's serve from a neutral stance, filmed from an animation-style side angle. The contact occurs with the racket head accelerating up from a deep racket drop, with a slightly closed racket face brushing up the back of the ball at a contact point a bit above shoulder height.
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13.4s |
Donna Vekic's Serve Vs. Coco Gauff's (4 of 6)
Sean O'Neil's two-handed backhand from the center of the baseline, filmed from a court-level rear angle. His hips stay relatively closed through the loading phase with a deep knee bend, then uncoil in sync with an upward leg drive to initiate rotation into the ball.
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1s |
Donna Vekic's Serve Vs. Coco Gauff's (5 of 6)
Sean O'Neil's first serve from the deuce side, filmed from a rear court-level angle. His continental grip is clearly visible with a relaxed hand, and you can see distinct wrist pronation through contact as the racquet edge leads and then turns outward toward the target.
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0.3s |
On Court with Dr. Brian Gordon (5 of 92)
Sean O'Neil's stroke animation from a central court position, filmed from a side angle. The contact point is depicted slightly in front of the body with a clearly closed-to-neutral racket face and a pronounced upward swing path through the hitting zone.
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2.6s |
Coco Gauff’s Second Serve: A Technical Analysis (5 of 7)
Sean O'Neil's forehand from the center of the baseline, filmed from a side CourtLevel angle. His stance transitions from a neutral setup into a strong upward swing path, with a clear weight shift from back to front foot as he drives through the shot.
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14.6s |
Donna Vekic's Serve Vs. Coco Gauff's (6 of 6)
Sean O'Neil's backhand from the Deuce side, filmed from a rear court-level angle. After contact he finishes with the racquet wrapping high across his body while his weight transfers onto his front foot and his non-hitting hand settles back into a ready position.
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0.3s |
On Court with Dr. Brian Gordon (6 of 92)
Sean O'Neil's stroke animation sequence from a neutral court position, filmed from a side angle. His follow-through is emphasized with clear weight transfer into the court and a distinct return to a balanced, ready position for the next shot.
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5.8s |
Coco Gauff’s Second Serve: A Technical Analysis (6 of 7)
Sean O'Neil’s serve contact-phase animation from a central court position, filmed from a side angle. His hips stay loaded with a pronounced knee bend, and you can see the legs extending upward through contact as the rear hip drives forward into the court.
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15.4s |
On Court with Dr. Brian Gordon (7 of 92)
Sean O'Neil's neutral-court movement and stroke mechanics, filmed from a side animation angle. His footwork pattern emphasizes a clear split-step into a semi-open stance, followed by efficient recovery steps that underline the biomechanical sequencing he teaches.
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11.8s |
Brian Gordon and the 3D Markerless Revolution (4 of 4)
Sean O'Neil's backhand from a neutral court position, filmed from a standard rear court-level angle. His two-handed grip structure is clear, with the dominant hand in a continental grip and the non-dominant hand applying firm pressure that keeps the wrist in a laid-back position until a late, sharp release through contact.
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2.4s |
Brian Gordon and the 3D Markerless Revolution (1 of 4)
Sean O'Neil's forehand from a central baseline position, filmed from a court-level rear angle. His shoulders rotate well past perpendicular to the net in the backswing, then uncoil in sync with the trunk so that the chest faces forward just after contact, illustrating clear upper-body sequencing.
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2.7s |
