Cristiano Ronaldo problem for Ralf Rangnick at Man United outlined by Roy Keane and Gary Neville

Ralf Rangnick finds himself in an “impossible situation” managing Cristiano Ronaldo at Manchester United, according to club legends Gary Neville and Roy Keane.

Ronaldo returned to the line-up in spectacular fashion on Saturday as his hat-trick secured a crucial 3-2 win over Tottenham at Old Trafford. His exploits also saw him break the record to become the highest FIFA recognised men's goalscorer of all time.

The victory gives United a huge boost in their quest to finish fourth in this season’s Premier League, with Ronaldo sending a timely reminder of his qualities. The five-time Ballon d’Or winner has faced questions over his place in the side this season, with some pundits and fans believing he can't fit into a modern system.

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His return to the side came a week after speculation surrounding his absence in the Manchester derby. Ronaldo missed the game through injury, although rumours circulated that he had been dropped by interim boss Ralf Rangnick, particularly after he flew home to Portugal on the day of the game.

Speaking about managing Ronaldo after the win over Spurs, Rangnick said: "It is challenging, it is a challenge with a player like him, he showed he’s still got quality to play for a club like Man United. If we want to be successful this season, we can only do it together."

Rangnick’s comments point towards the German not being entirely happy with Ronaldo’s trip to Portugal. Having questioned the United boss last weekend, Keane appeared to have some sympathy with Rangnick over his handling of the 37-year-old.

“That’s the challenge, what he’s doing on the pitch, what he’s doing away from