Michael Carrick has claimed things did not work for David Moyes at Manchester United
David Moyes was brought in as Sir Alex Ferguson's successor in 2013 but he lasted just one season with Manchester United.
The former Everton boss was given his marching orders following a 2-0 defeat to his former club in April 2014.
However, Michael Carrick has claimed Moyes' failure at Old Trafford was just one of those things and could not have been avoided.
David Moyes has equally struggled at Sunderland this season
"It was a tough time – I think we can all say that with Sir Alex leaving and the changes that happened after that," Carrick told Sky Sports.
"It was a tough season, there's no getting away from that.
"We had some success in the Champions League and we weren't too far away from getting past Bayern [Munich] in the quarter-finals so it's fine margins I think.
"When you look at it, it just didn't work that season and we didn't have a great season in the end.
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"Unfortunately for David, he lost his job so I'm sad how it finished but I suppose that's football.
"If you don't get the results, and you're the manager, you suffer for it.
"Just because it's tough times, it doesn't mean there's fighting and you don't get on or not like each other.
"Sometimes things just don't work out for many different reasons and that was the case."