When Lizzie spots the tennis courts that Peter learned on, and runs down the stairs, the sun is getting close to setting, but it is clearly still light out. By the time that Lizzie gets to the bottom of the stairs, it is pitch black in the sky.
When Peter is practicing his serves by hitting the empty cans,
he knocks down a few. When Lizzie comes in the cans are fixed.
After Peter slides on the wet grass in the championship game and turns onto his back, his shirt is barely dirty. When he sits up and is being called off the court by Danny, his shirt is completely muddy on one side.
In the shots of Centre Court being prepared for the Men's finals match, the grass is all green. During the match, the grass is well worn, as it would be at that stage of the tournament.
Early in the film, Peter throws a pillow at his brother which lands in his lap. In the very next shot, the pillow is nowhere to be seen as Peter's brother raises his hands and shrugs in reference to something their mother says.
Mens and womens semifinals are not played at the same day
(unless there has been rain) and definitely not at the same time as shown in the movie where both the leads are shown playing in the semifinals in the same shot.
Lizzie in her Dorchester Hotel suite yells "It's open!", urging Peter to go straight in. Dorchester Hotel doors cannot be left open - they, like most five star hotel room doors, slam shut automatically for security reasons.
Peter's semifinal match is played on a small outer court, rather than on Centre Court. Even if Centre Court was unavailable, the match would be played on Court 1 rather than an outer court.
In one of Peter's games he has advantage point and he is serving, however he serves from the right (deuce) side of the court, not the left (advantage) side of the court.
During the singles matches, the nets are all set up for doubles.
When Peter tries to sneak out of The Dorchester hotel towards the end, he runs towards his parked convertible, the streets wet from a rain shower. Still, the convertible is parked with its top down.
The grass in center court during the final match is too green and lush. In reality, after two weeks of intense play the court should have few green spots and more sandy areas, like a sandbox (the grass is not treated during the championship).
Set in summertime, but when Lizzie and Peter are around London, many trees have leaves that have either changed color or fallen off.
When entering the court for the championship match, Hammond and Colt are both carrying "Head" tennis bags, indicating the type of racket they use. Hammond's racket is a Wilson - clearly labeled and stenciled.
During the fifth set of the championship match, the scoreboard only shows the score of the first two sets instead of four.
During the final game the announcer says it is 40-0. The next second it is 30-30 and Peter loses the point so it then becomes 30-15.
Throughout the movie television coverage of the championships is shown on various TVs. For some reason they always show America's NBC network's coverage of the games. No NBC channels are available in the UK. The BBC cover Wimbledon on British television.
When at Peter's parent's house, in Brighton, his father is in the garden listening to the radio. At one point the radio announcer says 'You're listening to BBC London 94.9'. It would be impossible to receive BBC London Radio in Brighton unless on a Digital Radio. The radio depicted in the scene is obviously an analogue device.
After the party on the London Eye, which is in central London, Lizzie and Peter drive out of town and down to Brighton. We see a shot of their car driving along a road in London called the Westway. However, they are shown travelling east - back into town. They should be travelling West if they're leaving town and going to Brighton.
To travel from London to Brighton would involve a boring journey due south down the A23. The journey shown goes north across the Thames, then takes the Westway (A40/M40) heading west, presumably followed by the M25, A stretch of road that is possibly in Surrey, then the unclassified road between Eastbourne and Brighton that passes Beachy Head but heading towards Eastbourne. One can only assume Peter Colt is not in any hurry to get Lizzie back to his flat since this journey would probably take three times as long as driving directly.
When the entrance of Wimbledon is first shown, the image is actually the front of London Zoo, not Wimbledon.
When Colt is getting lunch he is asked what time his match is. He replies 3 o'clock. In his voiceover as he is walking onto the court to play the match he says that it is 2 o'clock.
In Colt's second round match against Dragomir, his voiceover claims that he only won 3 games, however the umpire clearly states that Dragomir leads 3 games to 2 and by 2 sets to 1. This means that Colt had to have won at least 8 games by this point.
When Peter plays on Court 3, the commentator mentions that it is known as the 'graveyard court'. Court 2 is actually the court called the 'graveyard court'.
When Peter is headed into his first game of Wimbledon, he says," So this is it. This is the end. This is what it looks like. 1000 balls a day, 300 days a year, for 25 years. 6,000,000 balls. And it all ends here. At 2 in the afternoon, on Court 17, while they're on center court, rooting for the latest Russian teenage beauty." 1000 balls/day x 300 days/year x 25 years is 7,500,000 balls, not six million.
On the match point against Dragomir, the ball hits the line and is in when Dragomir returns the serve.