Opelka, Kyrgios included in Team World for Laver Cup.
Tiger-tattooed Aryna Sabalenka clawed her way back from injury and disappointment to hoist the US Open trophy at last.
Images from the US Open men's singles first round matches, at Flushing Meadows, New York, on Tuesday.
IMAGES from Day 1 of the US Open played Flushing Meadows, New York, United States, on Monday.
In his pre-tournament news conference in Toronto on Sunday, Nadal said a recurring foot issue he has been dealing with since 2005 returned at the French Open, where he fell to eventual champion Djokovic in the semi-finals.
US Open champion Carlos Alcaraz has become the youngest world number one since the ATP rankings began in 1973.
The former world number one plans to play more of a full schedule next year and will work to improve on her serve, which she said let her down particularly in the first and third sets.
American Sloane Stephens battled back to defeat defending champion Caroline Garcia at the Cincinnati Open.
Iga Swiatek, Aryna Sabalenka and Coco Gauff, are a handful of contenders ready to swoop in
Iga Swiatek used an outfit change to help her reset after a poor start and beat China's Zheng Qinwen.
'Now, because of these mistakes, I'm not feeling that confident to continue with them. I was struggling a lot in the last months. I was waiting for the result. The only thing I need right now is some clean air.'
After successfully defending her Australian Open trophy in January, Aryna Sabalenka won the US Open crown in September for her third Grand Slam title.
Defending champion Djokovic fired his 15th ace on match point to defeat Querrey but his serve had been an issue earlier in their second-round encounter.
India's Sania Mirza and her partner Barbora Strycova entered the second round of the women's doubles event at the Toray Pan Pacific Open on Tuesday, after registering a hard-fought three sets win over unseeded local duo of Misaki Doi and Kurumi Nara. The second seeded Indo-Czech pair had to sweat it out for exactly two hours to getter of the Japanese combination 6-7(3) 7-5 10-8 in the super tie-breaker.
Second seed Rafael Nadal said he would make no excuses after his shock loss to American Frances Tiafoe in the US Open fourth round Monday, despite a serious abdominal injury that derailed his run-up to the year's final major.
The 22-year-old Australian breezed past the 15-times Grand Slam champion in about one hour and 20 minutes.
Ashleigh Barty stunningly lost her chance to regain the number one world ranking when the Australian was beaten in straight sets by Russian Svetlana Kuznetsova.
Three contenders for the women's singles title at the Australian Open.
Reader Anand Nijampurkar sent us this picture from Cincinnati.
Frances Tiafoe sees huge strides for American men after another deep US Open run. The ebullient fan favourite was already looking to the future.
Roger Federer's hopes of adding to his record Grand Slam haul got a boost as he beat Spain's David Ferrer 6-3, 1-6, 6-2 to win the Western and Southern Open title in Cincinnati on Sunday in the last key U.S. Open tune-up event.
World No 1 Carlos Alcaraz fended off in-form American Tommy Paul to reach the Cincinnati Open quarter-finals on Thursday
Former world number one Maria Sharapova will make her first Grand Slam appearance in over 18 months after she was awarded a main-draw wildcard for the upcoming US Open, the tennis tournament's organisers confirmed on Tuesday.
Petra Kvitova overcame a sluggish start and 10 double faults to beat Madison Keys 6-7(6), 6-4, 6-3 on Saturday and advance to the final of the Cincinnati Open, where she will face Caroline Garcia, the first qualifier to reach the final of a WTA 1000 tournament.
Aryna Sabalenka's return to top spot in the WTA rankings after leapfrogging Iga Swiatek has set up a thrilling end to the season, with next month's WTA Finals in Saudi Arabia likely to prove decisive in the race to end the year as world number one.
Novak Djokovic overcame a battling Marin Cilic 6-4, 3-6, 6-3 to reach his sixth Cincinnati Masters final on Saturday while Roger Federer enjoyed a less-taxing route to the title match after his semi-final opponent David Goffin retired with a shoulder injury.
Reader Anand Nijampurkar sent us this picture from Cincinnati.
World number four Stan Wawrinka has withdrawn from this month's Rogers Cup in Montreal and the Western & Southern Open in Cincinnati due to a knee injury, the Swiss said on Wednesday.
India's Leander Paes and his German partner Alexander Zverev went down to the Spanish duo of Feliciano Lopez and Marc Lopez in a men's doubles first round match to bow out of the Cincinnati Open.
The first teenager to play in a US Open final since Serena in 2001 there was symmetry to the moment as Gauff rallied to beat the second seeded Belarusian 2-6, 6-3, 6-2 and end a six-year barren stretch for American tennis fans, who were finally able to celebrate a homegrown champion.
Novak Djokovic wore down Lucas Pouille after an even first set, dispatching the Frenchman 7-6(2), 6-1 in a Cincinnati Masters quarter-final in Ohio on Friday.
Novak Djokovic's bid to add a 100th singles title to his trophy cabinet on Sunday was dashed after he was beaten 7-6(4), 6-3 by world number one Jannik Sinner in the Shanghai Masters final on Sunday.
A summary of Thursday's action at the US Open.
Sabalenka spent eight weeks at the summit last year before Swiatek overtook her with a victory at the season-ending WTA Finals and the Belarusian hopes for a longer stay as 'N1'.
India's Sania Mirza and her Czech partner Barbora Strycova defeated China's Chen Liang and Zhaoxuan Yang 6-1, 6-1 in the final to win the women's doubles titles at Toray Pan Pacific Open, in Tokyo, on Saturday.
Fifth seeds Leander Paes and Radek Stepanek were eliminated from the ATP Cincinnati Masters following their defeat to Vasek Pospisil and Jack Sock, in Cincinnati on Wednesday.
Reader Brahmanandam Somanchi sent us this picture from Cincinnati.
Serena Williams rallied past Denmark's Caroline Wozniacki on Saturday to reach the Western and Southern Open final in Cincinnati where she will face Ana Ivanovic, an upset winner over French Open champion Maria Sharapova.
Carlos Alcaraz will be backed to extend his winning run at the Grand Slams to 16 matches following triumphant French Open and Wimbledon campaigns.
Milos Raonic has withdrawn from the US Open due to a persistent wrist injury but plans to return to the Tour later in the year, the Canadian said on late on Wednesday.
