Shanghai, Oct. 5 -- Italy's world number two superstar Jannik Sinner retired hurt due to severe cramping during the ongoing Shanghai Masters on Sunday during his third-round match against Dutchman Tallon Griekspoor.

Griekspoor secured a 6-7 (3), 7-5, 3-2 win, bringing Sinner's title defence in the ATP Masters 1000 event to the most unfortunate end, as per Olympics.com.

Both players matched each other equally in the first set, and Griekspoor's powerful serves made problems for Sinner. Neither earned a break point, and things moved to a tie-break, and Sinner won the first set.

However, in the second set, tables turned in favour of Griekspoor as he held his nerves to capture it 7-5.

During the final set, Sinner suffered from cramps and l...