World number one Jannik Sinner recovered from a set down to claim a hard-fought victory against Tomas Martin Etcheverry in the third round of the Shanghai Masters.
The Italian top seed was pushed all the way before winning 6-7 (3-7) 6-4 6-2 in two hours 38 minutes.
In the decider, Sinner held on to his serve in an 11-minute sixth game to go 4-2 up, before winning the next two games to close out the win.
"It got stressful because if I lose the game at 3-2 and he makes the break then we are back even," said Sinner.