Charis Mavrias required stitches to a gaping wound in his arm after an ugly collision with an advertising billboard.
Mavrias was forced off before half-time during Sunderland Under-21s’ 1-0 win over Tottenham after he was left with blood flowing from his arm following a freak collision when he slid in for a tackle.
It’s quite a big gash in his arm and it was kind of a freak accidentRobbie Stockdale
The Greek international is not part of Dick Advocaat’s first-team plans after spending the second half of last season on loan at Panathinaikos, but he has been in decent form for the U21s.
Development coach Robbie Stockdale said: “It’s quite a big gash in his arm and it was kind of a freak accident.
“It’s a shame because he’s been really, really good Mav.
“He’s been one of our best players in pre-season and the start of this year.
“But these things happen and hopefully he’ll be back soon.”
Fellow winger Rees Greenwood stood-out after taking Mavrias’ place in the side, while striker Lynden Gooch was also bright, with his third goal in as many games proving sufficient to beat Spurs.
And Stockdale hopes the stand-out players in the U21s can follow Duncan Watmore into the first-team set-up after Advocaat was amongst the crowd at Eppleton CW.
Stockdale added: “We feel we’ve got some good players at the moment, so they need to keep performing well.
“The manager was here, which was great, so hopefully he’ll have seen something that he likes.
“We’re all really pleased Duncan is with the first-team and we think we’ve got a couple more who could move up with him.”