IMAGES from Day 1 of the Wimbledon Championships played on Monday.
Novak Djokovic began his bid to hold on to his number one ranking with an easy win over Gilles Muller in the Paris Masters second round while Andy Murray struggled through and Stan Wawrinka faltered on Wednesday.
Former world number one Garbine Muguruza was beaten 7-5, 6-4 by Aryna Sabalenka in the China Open second round on Tuesday while an ailing Jelena Ostapenko lost 6-0, 6-0 to Wang Qiang.
"Well, I don't know what his intentions are, how he feels, but he is definitely always one of the top favourites in every tournament that he plays," said Djokovic, who beat Slovenian qualifier Aljaz Bedene 6-3, 6-2, 6-4 to join the Spaniard in the second round on Tuesday.
Novak Djokovic sauntered past Spaniard Feliciano Lopez to reach the quarter-finals of the Shanghai Masters on Thursday but Andy Murray had to claw past big-serving American John Isner after losing a first-set tiebreaker.
Images from Day 1 of the US Open in New York, on Monday.
The seventh-seeded Bulgarian advanced to his eighth ATP World Tour Masters 1000 quarter-final with a 6-3, 7-5 victory over Del Potro, who struggled with the intense heat in the closing stages of the one hour, 39 minute match.
World number one Simona Halep saved three match-points before edging past an inspired Lauren Davis 4-6, 6-4, 15-13 in a thrilling marathon to reach the fourth round of the Australian Open on Saturday.
Images from the Australian Open matches played on Tuesday.
Belarusian ninth seed Aryna Sabalenka held off a spirited challenge from American Alison Riske to win 6-3, 3-6, 6-1 and successfully defend her Wuhan Open title on Saturday.
World number five Alexander Zverev continued his poor recent form as he crashed out of the Italian Open in the second round while Serena Williams had to pull out of the women's draw with a recurring knee injury.
World number one Rafael Nadal won a battle of attrition against fellow left-hander Yoshihito Nishioka of Japan 7-6(4), 6-4 to seal Spain's spot in the final eight of the inaugural ATP Cup in Perth on Wednesday. Meanwhile his long-time rival, world number two Novak Djokovic, had an easier outing in Brisbane, strolling past Chile's Cristian Garin 6-3, 6-3 to stay undefeated in the new year.
Images from the matches played on Day 8at the Roland Garros on Sunday
Nadal, who got a first-round bye, defeated Richard Gasquet 6-3, 6-4 to advance.
Barcelona forward Luis Suarez scored a hat-trick as his side thrashed arch-rivals Real Madrid 5-1 on Sunday in a highly entertaining 'Clasico' which surely will signal the end of hapless coach Julen Lopetegui's spell in charge of Real.
Images from Wednesday's matches at Roland Garros
The Danish World No 3 ended 2017 with the biggest title of her career in Singapore and returned a day after thrashing Madison Brengle in her season opener to hit 21 winners against eight unforced errors in the 53-minute win over Martic.
IMAGES from matches played on Day 7 of the French Open at the Roland Garros in Paris on Saturday
Bernard Tomic is set to sit out the Australian Open after Tennis Australia (TA) decided not to award him a wildcard to the main draw, the organisers said on Thursday.
Karolina Pliskova lost her cool over a line call and bashed a hole into the umpire's chair with her racket after suffering a 3-6, 6-3, 7-5 defeat by Maria Sakkari in the Italian Open second round on Wednesday.
There was no farewell goal but plenty of pride and appreciation as Wayne Rooney made his 120th and final appearance for England in a 3-0 win over the United States in a friendly at Wembley on Thursday.
Images from Day 2 of the Australian Open in Melbourne on Tuesday
Images from matches played on Day 4 of the Australian Open at Melbourne Park on Thursday
A summary of Wednesday's matches in the UEFA Champions League.