Ralf Rangnick became Manchester United’s interim manager after Ole Gunnar Solskjaer was sacked in November. The German has had success in the Bundesliga, especially with RB Leipzig, helping the club play European football for the time in their history. Rangnick had also tutored Jurgen Klopp and Thomas Tuchel in the past.Manchester United have had a poor seasonManchester United have been through some tough times in recent years. One of the greatest clubs in the world, United have been a shadow of their former selves, especially this season. With big names failing to make an impression and managers being sacked, Manchester United’s turbulent season has proven to be a nightmare.Manchester United may still be in troubled waters but their boat seems to have stabilized considerably under Rangnick. The German has been working hard in training to get the best out of his players. Although they are nowhere near where they want to be, fans will accept any sort of progress even if it’s painfully slow.Let’s now take a look at the five players that have improved the most under Rangnick. We have based this list on the official rankings by whoscored.com.#5 Bruno FernandesManchester United v West Ham United - Premier LeagueBruno Fernandes has been an outstanding acquisition for Manchester United and was largely responsible for their brilliant finish to last year’s campaign. He was a reliable source of both goals and assists for the Red Devils. However, the Portuguese appeared to have lost his touch in the first few weeks under Ralf Rangnick.Manchester United fans will be pleased to see that their midfield maestro has made a comeback in terms of his performances of late. Rangnick believes Fernandes is best-suited in a deeper midfield role because of his work rate. The Portuguese international has both scored and assisted twice in his last three games.Fernandes has seven goals and five assists in 17 Premier League appearances this season. After initially struggling, Fernandes regained his touch and has been influential for the Red Devils. His contributions will be key if United are to get a top-four spot this season.#4 David De GeaManchester United v West Ham United - Premier LeagueDavid De Gea’s contributions have been nothing short of miraculous for Manchester United this season. He has played every single minute in the Premier League and has been a brick wall for the Red Devils. He was also United’s Player of the Month in December, his second consecutive award.The Spaniard has made 84 saves this season, more than any other keeper in the league. He may have kept just five clean sheets this season, but has come to the rescue of Manchester United on countless occasions. Their league position would be much worse without the Spaniard’s efforts.Gary Bailey@gary_bailey1Well done David de Gea on the clean sheet… … I decided not to post before match as last 5 games haven’t seen a clean sheet … but now at last you’ve equalled my record… now for the next clean sheet 10:22 AM · Jan 22, 2022215961935Well done David de Gea on the clean sheet👏👏… … I decided not to post before match as last 5 games haven’t seen a clean sheet … but now at last you’ve equalled my record… now for the next clean sheet 👍👍 https://t.co/S4Opik9wSqDe Gea has been no stranger to criticism in recent years but has attracted widespread appreciation and plaudits from pundits and supporters in recent times. Ralf Rangnick has heaped praise on his goalkeeper and believes de Gea is the best in the world at controlling the six-yard box.