By Ewan Murray Ruud van Nistelrooy is the man tasked with guiding Manchester United to the Carabao Cup quarter-finals on Wednesday evening as the Red Devils host Leicester City in the fourth round of the competition. The iconic former Man Utd striker and club’s assistant manager will take charge of the team on an interim basis following thesacking of Erik ten Hag on Monday, with Ruben Amorim of Sporting CP being lined up as the Red Devils’ next permanent boss. Van Nistelrooy’s time in the dugout is likely to be brief but he will want to steady the ship at the very least, with Wednesday the per…