By Jack Gallagher The FA have confirmed that Manchester United star Kobbie Mainoo is one of three players to withdraw from the England senior squad for the October internationals. Mainoo has been joined by Aston Villa’s Ezri Konsa and Nottingham Forest’s Morgan Gibbs-White in withdrawing from the squad to face Greece and Finland in the UEFA Nations League. The young midfielder has been an integral part of Erik ten Hag’s plans at club level thus far this season, stating all seven of Man Utd’s Premier League games. Mainoo was once again in the starting lineup over the weekend, playing 85 minutes…