Ki is suffering from knee tendonitis and is expected to miss a couple of weeks, Chronicle Live reports.

Ki has three goals and one assist in 28 appearances this season, making him a relatively weak fantasy option given his midfield status.

Ki grabbed a late goal as a sub in the 2-1 loss to Liverpool on Wednesday.

Ki also hit the frame of the goal minutes before he netted with his header off a corner. He was likely a substitute just to grab some rest, as this is a busy week for most of the EPL squads. Ki is arguably Sunderland's most valuable player right now, as he continues to contribute offensively and even defensively for the Black Cats.

Ki scored again Saturday, as well as contributing an assist, in the big 4-1 win over Fulham.

Ki has been very productive lately and a great pickup for Sunderland. It seems as though this team will ride Ki, Adam Johnson, and the defense to climb out of the relegation zone. Ki should continue to produce when seeing 90 minutes every match.

Ki failed to contribute any stats in the 1-0 loss against Aston Villa, but was arguably the best player on the pitch for Sunderland.

Ki was actually the only Sunderland player to record a shot on goal. It seems that Ki and Sebastian Larssen will switch off taking free kicks, but if Ki could take over that full responsibility, he could become a legitimate fantasy option.

Ki, scored a penalty in the 25th minute to win the 1-0 Boxing Day match against Everton.

Ki has been a very valuable player to this struggling Sunderland side. That's two goals in his last three games and he has recorded 10 shots in his last four games.

Celtic have agreed to sell Sung-Yueng for a fee of £5 million to Swansea City, Daily Star reports.