United States' Serena Williams returns the ball to Spain's Carla Suarez Navarro.
The incident occurred during a practice session before the start of this year's tournament, reports Xinhua news agency.
The seven-time Wimbledon champion, playing just her sixth tournament of 2019, defeated Carla Suarez Navarro on Monday to reach the quarter-finals.
Meanwhile, Italy's Fabio Fognini was fined $3,000 for saying during his third-round loss that he wished a bomb would hit Wimbledon.
Australian Nick Kyrgios was imposed two fines, one for $3,000 from the first round and another for $5,000 from the second round, both for unsportsmanlike conduct.
He lost to Rafael Nadal in four sets in the second round.
Indo-Asian News Service
Tennis star Serena Williams has revealed that she has apologised to Japan's Naomi Osaka who defeated her in the finals of the US Open last year.
US tennis superstar Serena Williams topped Forbes magazine's list of the highest paid women in sports for the fourth straight year on Tuesday.
Simona Halep kept alive hopes of regaining the world number one ranking Sunday, beating Polona Hercog 5-7, 7-6 (7/1), 6-2 to reach the last 16 of the WTA and ATP Miami Open.
Rohit Sharma described his maiden Test double century as "most challenging" after he lifted India out of early trouble and put the hosts in command of the third match against South Africa. The tourists were in trouble at nine for two, with Indian fast bowlers sending the opposition openers back to the pavilion.
The 22-year-old Amanda was seen saying "yes" as her teammates egged the couple on in the background.
Kodjo Laba’s fourth goal of the campaign secured the three points for Al Ain in a 2-1 win against Hatta at Hazza bin Zayed Stadium in Matchweek 4 of the Arabian Gulf League on Saturday.
Manchester City brushed aside in-form Crystal Palace 2-0 on Saturday to narrow the gap to Premier League leaders Liverpool to five points. The defending champions travelled to London with questions over their ability to sustain a title challenge