Wayne Rooney and Cristiano Ronaldo enjoyed so much success at Manchester United together.

They got on well both on and off the pitch during their five-year stint together at the Red Devils.

But there's been a bit of a back and forth between them in recent times.

Rooney appeared on Sky Sports' Monday Night Football where he slammed the 37-year-old.

When asked whether the move had worked out, Rooney replied: "You’d have to say no at the minute.

“I think he’s scored goals, he’s scored important goals in the Champions League early on in the season, he obviously scored the hat-trick against Tottenham, but I think if you’re looking to the future of the club, you have to go with younger, hungry players to do the best and lift Manchester United over these next two or three years.

Manchester United's Cristiano Ronaldo (L) celebrates his second goal against Portsmouth with Wayne Rooney (C) and Paul Scholes during their English Premier League soccer match at Old Trafford in Manchester, northern England January 30, 2008. REUTERS/Darren Staples (BRITAIN). NO ONLINE/INTERNET USAGE WITHOUT A LICENCE FROM THE FOOTBALL DATA CO LTD. FOR LICENCE ENQUIRIES PLEASE TELEPHONE +44 (0) 207 864 9000.

“Obviously Cristiano is getting on a bit, he certainly isn’t the player he was when he was in his 20s, and that happens, that’s football.

“He’s a goal threat but the rest of the game they need more, they need young hungry players.”

Ronaldo saw his former teammate's comments and he didn't appear to be too impressed.

Ronaldo posted a comment on Rooney's Instagram page accusing him of being 'jealous'.

Rooney was asked about Ronaldo's comments in his press conference on Thursday afternoon.

He name-dropped Lionel Messi in his brilliant answer. View his reaction below...

“I saw that this morning," he said when asked about Ronaldo's comment.

“I’d say there’s probably not a footballer on the planet who isn’t jealous of Cristiano.

“The career he’s had, the trophies he’s won, the money he’s earned… his six pack!

“Every player bar [apart from] Lionel Messi is jealous of Cristiano.”

Rooney doesn't seem too hurt by Ronaldo's comment. Fair play to him for having a laugh and defusing any tension there might have been between the two.