Photo: Instagram/Thomas Partey Thomas Partey, an Arsenal midfielder, will have an MRI scan this weekend after coming off injured in the FA Cup fourth-round defeat at Manchester City. Partey was substituted at half-time in Friday night's loss and was replaced by Albert Sambi Lokonga. Arsenal boss Mikel Arteta confirmed that the Ghanaian, who has been a key part of their season, was in "some discomfort." Photo: Instagram/Thomas Partey The Gunners are currently on the lookout for a new midfielder before the transfer window closes and any serious injury to Partey could accelerate those plans. Meanwhile, Arsenal had a £60m bid rejected for Brighton midfielder Moises Caicedo, who has confirmed he wants to leave the club. Read Next: Durant And Irving Named NBA All-Star Game Starters For Brooklyn Nets Source: Sky Sports