Ben Shelton (No. 20) will meet Gael Monfils (No. 41) in the Round of 16 at the Australian Open on Sunday, January 19.Monfils enters the Round of 16 after his four-set win on Friday over Taylor

Ben Shelton has shared what Gael Monfils is really like after their Australian Open fourth-round clash. The 38-year-old Frenchman was forced to retire from their match on Monday while trailing by two sets to one. Afterwards, Shelton opened up on a private chat he shared with the former world No. 6.

The United States’ Shelton has reached the last eight in Melbourne after Gaël Monfils’ unfortunate retirement in round four.

Ben Shelton ground down French veteran Gael Monfils Monday to set up an Australian Open quarter-final against Lorenzo Sonego, who ended teenage qualifier Learner Tien's fairytale run. But again nothing separated them until Shelton ended the resistance of Monfils with a series of winners to take the tiebreak and the veteran retired soon after.

Round of 16 action at the Australian Open features young American Alex Michelsen against Australia’s hope Alex de Minaur, while the ageless Gael Monfils squares off with Ben Shelton.