New Manchester United manager Jose Mourinho has already taken a subtle dig at Arsenal boss Arsene Wenger by claiming that some managers haven't won a title for 10 years.
Gunners chief Wenger, of course, hasn't secured the Premier League title since 2004, while Mourinho last secured the prestigious honour as Chelsea boss back in 2015.
The aforementioned managers both have quite the history of taking digs at each other and it's fair to say that Mourinho, just four minutes into his press conference, has once subtly trolled his rival.
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When asked whether he has a point to prove following his poor campaign at Chelsea, Mourinho stated: "There are some managers that last won a title 10 years ago.
"Some of them, the last time they won a title was never. The last time I won a title was one year ago. It was not 10 years ago, 15 years ago, it was one year ago. If I have a lot to prove then imagine the others."
There has already been a response on social media and here are some of the best tweets:
Mourinho era to begin
But what will Mourinho's first couple of months look like at Old Trafford? Well, the players that didn't take part in a major tournament this summer are set to return for pre-season training on Wednesday.
That will include the likes of Juan Mata, Ander Herrera and Phil Jones, who will all be desperate to impress the Special One.
Mourinho's first game in charge of the Red Devils will come in just 17 days time against German outfit Borussia Dortmund in China. It's fair to say that his second game at the helm - a showdown with Pep Guardiola and Manchester City - will take centre stage on July 25, while his side will come up against Turkish outfit Galatasaray on July 30.
United will take on Everton at Old Trafford on August 3 for Wayne Rooney's testimonial, before battling Premier League champions Leicester City in the Community Shield at Wembley on August 7.
Mourinho's first Premier League game for United will come at the Vitality Stadium against Bournemouth on August 13.
Will Manchester United challenge for the Premier League title this season? Have your say below!