Mata has appeared twice this season for Mourinho’s side, in their season opening victory over Leicester City and then a week later in the defeat to Brighton and Hove Albion.
However, he was taken off at half-time in the Brighton defeat and hasn’t featured since, but after time spent at home he feels he is ready to feature again.
“After spending some time back at home in Asturias, visiting family and friends, I’m starting the week feeling good,” he wrote on his blog.
“As you all know, we’ve had a few days that are different to the norm, as there aren’t any domestic games, so we’ve made the most of being able to train hard during the week and then rest at the weekend.
“I chose to spend mine back at home, to make sure that I’m feeling fully charged ahead of the games that are coming up soon.
“It was a great couple of days, as there was great weather and also Asturias’ regional holiday, so my break was perfectly timed.
“Right now, however, I am writing this back in Manchester, ready to get back into training and already thinking ahead to our next Premier League match against Watford.
“Personally, I am already focused on getting myself ready for what’s to come in the Premier League, Champions League and the League Cup, as during this rather busy month we will be playing in all three competitions.”
The Spanish international has featured 41 times for his country without scoring but has not lined-up for his national side since 2016.
He won the World Cup in 2010 and then the European Championship in 2012 but has found opportunities limited as youth and home-based talent are the priority.
He first moved to England when he joined Chelsea FC from Valencia in 2011 and he spent two and a half seasons at Stamford Bridge, winning their player of the year award in his first two seasons.
He moved to Manchester United midway through the 2013-14 season for a reported fee of £37.1m, a club-record fee for the club at the time.
His contract runs out at the end of this season and he will hope to once again become a key man for United in order to secure his future at or away from Old Trafford.
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