Watch: New Man United signing already out to impress Jose Mourinho

Eric Bailly is looking forward to starting life at Manchester United...

A video posted by Eric Bailly (@ericbailly24) on

Eric Bailly is clearly determined to prove his worth to new Manchester United manager Jose Mourinho as he steps up his preparations for the new season.

The 22-year-old defender became the Portuguese coach’s first signing as United boss as Mourinho moved quickly to bring in his first recruit from Villarreal.

Bailly is now preparing to report for pre-season training at Carrington as he gears up for his first season in the Premier League.

And the defender is clearly intent on impressing his new manager, as he put in the work in his own time behind closed doors in the gym.

Bailly uploaded the video above of himself running on a treadmill on his personal Instagram account and wrote: “The countdown has begun. Can’t wait to start as a Red Devil!”

MORE: The latest Man United news and views

MORE: The latest Man United player tweets

United moved quickly to appoint Mourinho as their new manager last month after opting to sack Louis van Gaal just two days after the Dutchman led them to FA Cup glory and their fifth-placed finish in the league.

Alan Shearer (Photo: BBC Sport / Screengrab)
‘Just too good’: Alan Shearer heaps praise on Chelsea FC trio
Gabriel Martinelli
Mikel Arteta sends fresh message to Arsenal fans about Gabriel Martinelli
Paul Merson
Paul Merson: Harry Kane would be 'perfect' for Man United
Kai Havertz
‘I have to’: Kai Havertz makes vow to Chelsea FC fans
Mason Mount
Thomas Tuchel makes bold prediction about Mason Mount at Chelsea FC
Alan Shearer (Photo: BBC Sport / Screengrab)
‘Just too good’: Alan Shearer heaps praise on Chelsea FC trio
Gabriel Martinelli
Mikel Arteta sends fresh message to Arsenal fans about Gabriel Martinelli
Paul Merson
Paul Merson: Harry Kane would be 'perfect' for Man United
Kai Havertz
‘I have to’: Kai Havertz makes vow to Chelsea FC fans
Mason Mount
Thomas Tuchel makes bold prediction about Mason Mount at Chelsea FC
Top 50 Muslim footballers: Arsenal, Chelsea FC, Liverpool FC and Man United stars feature
Top 50 Muslim footballers: Arsenal, Chelsea FC, Liverpool FC and Man United stars feature