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.
A summary of sports events and sports persons, who made news on Saturday
Milos Raonic overcame third seed Grigor Dimitrov 7-5, 3-6, 6-3 to reach the third round at the Madrid Open on Tuesday and set up an all-Canadian clash with teenager Denis Shapovalov.
Images from all the action on Day 3 at the Australian Open in Melbourne on Wednesday
Roger Federer rallied from a set down to beat Moldovan surprise package Radu Albot 4-6, 7-5, 6-3 in a stuttering start to the 20-times Grand Slam champion's Miami Open campaign on Saturday.
IMAGES from Day 9 of the US Open matches played on Tuesday
Images from the action on Day 2 at the Australian Open.
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.
The Scot lost 6-4, 6-4 to Richard Gasquet in his first singles match since January before saying he had turned down a wild card into the men's draw at the year's final Grand Slam.
World number one Simona Halep swatted aside American Nicole Gibbs while Maria Sharapova was flawless in her straight sets victory over Romania's Mihaela Buzarnescu in the opening round of the Shenzhen Open on Monday.
Konta first British woman in US Open last 16 since 1991
A ruthless Sorana Cirstea took full advantage of Karolina Pliskova's patchy form at the China Open on Thursday, reaching the quarter-finals as she consigned the recently dethroned world number one to a 6-1, 7-5 defeat.
A summary of sports events and sports persons, who made news on Tuesday
Images from Day 3 of the Australian Open in Melbourne on Wednesday
Angelique Kerber's first Grand Slam match since winning the Australian Open in January ended in despair after she was beaten 6-2, 3-6, 6-3 by Kiki Bertens of the Netherlands in the French Open first round in Paris, on Tuesday.
A summary of sports events and persons who made news on Friday.
Playing tennis professionally can be difficult physically, mentally and emotionally. But the tennis courts have often been the venue for for blossoming romance as love-struck couples decide it is game, set and match.
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 returning Scot also announced his withdrawal from next week's Rogers Cup in Toronto.
'The boys have hit a lot of balls and are feeling good, so we are looking forward to the weekend' The Indian team, which had a week-long training camp in New York before reaching Edmonton, is set to make a fourth consecutive attempt to qualify for the elite World Group.
Everton have been handed the dubious distinction of being the 'dirtiest' Premier League team after a study on the all-time cards and fouls by www.dirtyteams.co.uk.
It was a day of surprises at Flushing Meadows in New York as seeded players were knocked out one after the other on Friday.