Alexis Sanchez‘s move to Manchester United is inching closer after the Chilean posted video on Instagram of him boarding a private jet.

The 29-year-old forward is widely expected to complete his move to the Red Devils on Monday, with Henrikh Mkhitaryan heading in the opposite direction.

And on Sunday Sanchez shared an Instagram Story with his followers on the social media platform, apparently of him walking across an air strip towards a jet.

Sanchez is set to become United’s best-paid player, with some reports putting his salary at £400,000 per week, and Steve McClaren has warned that salary could create dressing-room disharmony at United.

“That is the danger in the modern game and the problem I find in clubs,” said McClaren, the former England manager and Sir Alex Ferguson’s assistant when United won then treble in 1999.

“Wage parity is very important to players. Yes, they find out – at all levels – and if someone is paid a lot higher than others that can cause a problem.

“In the short term I don’t see a problem, but in the long term for Manchester United they will have to solve that problem.

“If he (Sanchez) is on the wages that is being bandied about then other players will know that when their contracts come up or they are in demand from other clubs.

“The others will be looking at renegotiation next season or the season after and getting to that (wage) level if they think they are at that level.”

But McClaren believes United have struck a major blow by landing Sanchez, who has scored 80 goals in 166 appearances at Arsenal.

“Any manager worth his salt would love to have Sanchez in their team,” McClaren told BBC Radio 5 Live’s Sportsweek programme.

“Sanchez coming in for the second half of the season at Manchester United is a huge boost to them.

“He has got that experience and toughness, he wins games and he is a leader.

“It will lift the level of the whole club.”

Press Association Sport understands that both Sanchez and Mkhitaryan are set to undergo medicals on Sunday, with the swap deal likely to be formally announced on Monday.