Monaco star Tiemoué Bakayoko is due to complete his medical in London today ahead of a proposed £39m move to Chelsea.The 22-year-old central midfielder sent Chelsea and Manchester United fans into a bit of a tizz on Friday morning with a rather cheeky tweet.Antonio Conte made Bakayoko a key transfer target this summer but had to fight off reported competition from Premier League rivals Manchester United.Bakayoko had knee surgery at the end of the 2016/17 campaign and his recovery time had caused his move to Stamford Bridge to stall.The young French international may not return to first team football until September and Conte is yet to decide if the new addition will join the rest of the squad for the pre-season tour of China and Singapore.

Trolling level: Expert

Bakayoko is in London today, as his brother's Snapchat proves, but he decided to take the opportunity to troll Premier League fans regardless.

He tweeted "Good morning" early on Friday morning but, seeing an opportunity to have some fun, changed the location to Manchester, England.

As you can guess, this quickly sent Manchester United and Chelsea fans into a meltdown on social media.

Bakayoko backed out and deleted the tweet one hour later but was also getting up to no good on his social media platforms.

Looking to cause a stir, he unfollowed Chelsea on Instagram and followed Manchester United, Eric Bailly and Marcus Rashford.

On-the-ball Chelsea fans quickly deduced that Bakayoko was trolling but many weren't so perceptive.

Bakayoko could be announced as a Chelsea player later today and his arrival could prompt the departure of unsettled Serbian midfielder Nemanja Matic.

Juventus are reportedly interested but Matic has been heavily linked with a move to Manchester United throughout the summer.

The 28-year-old defensive midfielder was initially re-signed at Chelsea by Jose Mourinho in 2014 and the Portuguese United boss clearly still admires him.

"At this moment he is a giant," said Mourinho about Matic in November 2014. "Not for his size but for the way he plays. The man is a giant."