Manchester United have hired athletics guru Harry Marra as they seek to sharpen up the players’ fitness and sprinting technique

Manchester United have hired world-renowned track and field coach Harry Marra as a consultant help the club's players. The 78-year-old has been working at the club's Carrington training base to help the squad adapt to manager Ruben Amorim 's tactics.

The 78-year-old American is considered one of the outstanding coaches in the history of track and field, and is best known for helping decathlete Ashton Eaton to two Olympic gold medals. He also coached Brianne Theisen, Eaton’s wife, who is a world and Olympic medalist in heptathlon.