PARIS: Stefanos Tsitsipas called on organisers to introduce Hawk-Eye at Roland Garros after a tight line call on match point saw Stan Wawrinka secure victory in a thrilling fourth-round match on Sunday.

The 20-year-old Tsitsipas appeared to initially contest the call on court, before accepting that Wawrinka's astonishing backhand from deep behind the baseline had caught the outside of the line.

"Yes, it was in. And, yes, we should (have Hawk-Eye). It's just more fair," said the Greek.