Manchester United have targeted Celtic and Scotland physio Tim Williamson as Ole Gunnar Solskjaer continues to reshuffle his backroom team.

There are concerns at United over the number of soft tissue, non-contact injuries that have seen Anthony Martial, Paul Pogba, Marcus Rashford, Diogo Dalot, Luke Shaw, Phil Jones and Angel Gomes sidelined in the early part of the season.

Some of those players have recovered but Solskjaer has already confirmed that Martial will be missing for a seventh game in a row when his side face AZ Alkmaar in Holland on Thursday.

Manchester United have targeted Celtic and Scotland physio Tim Williamson (right)

There are concerns at United over the number of soft tissue, non-contact injuries

It's understood that United have advertised for a head physio and already conducted some interviews, but Williamson has been identified as a leading candidate.

Celtic's head of physiotherapy is in his second spell at the Scottish club having previously worked at Birmingham as well as Tottenham and Leeds United academies. Williamson's services are also used by the Scotland national team.

United have made a number of changes to the backroom staff since Solskjaer returned to the club as manager in December.

The Norwegian was reunited with head goalkeeper coach Richard Hartis and coach Mark Dempsey who both assisted him at Molde and Cardiff City.

It's understood United have advertised for a head physio, but Williamson is a leading candidate

Hartis' return to United in June culminated in last week's departure of goalkeeper coach Emilio Alvarez who had worked closely with David de Gea for the last three years.

Dempsey, meanwhile, is easing his way back into the set-up at Carrington after he was at the centre of a health scare on the club's pre-season tour in Perth, forcing him to fly home and miss the remaining legs in Singapore and Shanghai.

The 55-year-old has since been on sick leave but has observed training several times, most recently on Sunday.

Ole Gunnar Solskjaer is continuing to reshuffle his backroom team at Old Trafford

Having promoted Under-18s fitness coach Charlie Owen to first-team duties in March, United also appointed Ed Leng from Melbourne City as lead sports scientist and brought back ex-player Michael Clegg as first-team strength and power coach in July.

More recently, Martyn Pert has been working with the first-team at Carrington. Pert is a well travelled coach who also has a background in sports science.

The changes have done little to reduce the size of United's backroom team. At West Ham 10 days ago, the club had 30 coaching and support staff on duty in addition to the 20-man playing squad.