The former Red Devils captain has slammed the current manager at Old Trafford after the Portuguese complained about heavy fixture congestion
Manchester United great Roy Keane questioned whether his former club is perhaps "too big" for manager Jose Mourinho.
Despite reaching the Europa League quarter-finals with a 1-0 win over Rostov on Thursday, Mourinho moaned about United's busy run of fixtures and claimed his squad was struggling with fatigue..
Keane, a former captain and seven-time Premier League winner at United, was furious with Mourinho, saying the Portuguese tactician needed to embrace the demands of managing at Old Trafford.