Chelsea are waiting to found out the extent of Mason Mount’s injury, after a challenge from former Gunner Francis Coquelin.

LONDON, ENGLAND - SEPTEMBER 17: An injured Mason Mount of Chelsea leaves the pitch during the UEFA Champions League group H match between Chelsea FC and Valencia CF at Stamford Bridge on September 17, 2019, in London, United Kingdom. (Photo by Richard Heathcote / Getty Images)
LONDON, ENGLAND – SEPTEMBER 17: An injured Mason Mount of Chelsea leaves the pitch during the UEFA Champions League group H match between Chelsea FC and Valencia CF at Stamford Bridge on September 17, 2019, in London, United Kingdom. (Photo by Richard Heathcote / Getty Images)

Nine minutes into Chelsea’s opening Champions League group stage game against Valencia, Coquelin picked up a yellow card for a challenge on Mount. The Blues’ midfielder tried to stay on at first but ended up being substituted minutes later.

The Daily Mirror report that Chelsea will today find out the extent of the injury.

The actual challenge has divided opinion on social media. Coquelin initially had control of the ball, before making to pass it after a heavy touch. He got to the ball first and got a clean contact on the ball, but caught Mount nastily on the follow-through.

Of course, the Chelsea fans were all convinced it was a foul, and the mainstream media Twitter accounts tried to rustle up outrage by only posting pictures of the actual contact:

On the other side, many argued it wasn’t even a tackle, just a pass with a bad follow-through.

Regardless, it’s a shame to see a player having to leave the field with injury on his Champions League debut.

On the positive side of things for Arsenal fans, Valencia won the match 1-0. Chelsea won’t be able to take their foot off the gas in their remaining European group stage fixtures if they want to fight for top spot.