Alexis Sanchez undertakes extra training as Manchester United star bids to recover full match sharpness after January switch from Arsenal

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Manchester United star Alexis Sanchez has undertaken extra training since joining from Arsenal in a bid to recover maximum sharpness for his new club.

The Chilean sealed a move to Old Trafford in the January transfer window and scored his first United goal in their comfortable 2-0 win over Huddersfield on Saturday.

Sanchez has delivered some inconsistent displays this season and has taken it upon himself to go the extra mile in training as he tries to achieve peak fitness for Jose Mourinho.

Manchester United star Alexis Sanchez has undertaken extra training since joining the club

According to The Sun, Sanchez has been putting in extra hours after regular sessions are complete in order to return to his best form.

'He has been doing an extra half an hour after the main session has finished by himself,' said a United insider.

'Nobody had asked him to do it but he feels there is an extra sharpness to be had.

'He has got his head down and you can see the steam coming off his body after working outside, it's so impressive.

'He doesn't have to do it, he just insists on it. You will not find a better pro around really, he's superb.' 

The Chilean has been doing an extra 30 minute session as he bids to recover full sharpness

The Chilean feels he is off the pace and, after inconsistency, wants to be in tip-top shape

Mourinho has revealed he is confident United won't require any further attacking reinforcements this summer after the signing of Sanchez last month.

The Red Devils have been linked with the likes of Gareth Bale and Antoine Griezmann in recent windows, but Mourinho insists they will focus on other areas.

'We have Alexis, we have [Romelu] Lukaku, we have [Anthony] Martial, we have [Marcus] Rashford. Rashford can play on the left or on the right. Alexis is exactly the same,' said Mourinho.

'All of them, apart from Lukaku, can play from behind as a second striker, that's why I say it is bad for you. You like to have things to write and things to speculate, especially in the summer.

'But I don't want attacking players, so don't speak about attacking players that are coming here because nobody is coming here.' 

Sanchez scored his first goal for the club in the comfortable 2-0 win over Arsenal on Saturday