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World number Jannik Sinner was delighted to come through a 'very tough match' against Tomas Martin Etcheverry at the Shanghai Masters on Sunday.
Sinner lost the opening set on a tie-break before he bounced back to secure a 6-7(3) 6-4 6-2 win in two hours and 39 minutes.
The top seed, whose 15-match winning streak ended with a defeat by rival Carlos Alcaraz at the China Open, will face Roberto Carballes Baena or Ben Shelton for a place in the quarter-finals as he bids to secure his seventh title this year.
"It was a very tough match, physically and mentally, so I am very happy to get through this one," said Sinner.
"I felt like it was a tough set that I lost. I had my chances (to win the first set), but these things can happen.
"Sometimes you have to wait for your chances, which I have done, trying to stay calm mentally, and today that was the key."
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