If there was a competition for the worst 20 minutes by a Premier League footballer this season, Aaron Ramsey produced an award winning display.
First Younes Kaboul's free kick deflected off the Welshman and past Petr Cech in the 10th minute.
Then he was dispossessed in the build up to Watford's second in the 13th minute.
And to cap it off Ramsey was forced off to come off with a calf injury four minutes later.
Arsenal fans celebrate Aaron Ramsey injury
Tue, January 31, 2017
Arsenal fans on Twitter weren't too disappointed to see Aaron Ramsey leave the field early…
1 of 11
Arsenal fans on Twitter weren't too disappointed as Aaron Ramsey left injured…
Arsenal have been guilty of making slow starts all season and they were caught out again tonight.
Watford at home was a must win game yet Arsenal began the match far too casually.
The away side were more aggressive, clinical, determined and fully deserved their win.
Arsenal were already very thin in midfield with Granit Xhaka suspended, Mohamed Elneny at the Africa Cup of Nations, Santi Cazorla injured and Jack Wilshere out on loan.
The last thing Arsene Wenger needed was to see Aaron Ramsey come off with an injury.
And then watch Alex Oxlade-Chamberlain hobble through the last 20 minutes.
Aaron RamseyPremier League title hopes
Arsenal already faced an uphill task to catch Chelsea, starting the game eight points ahead.
Failure to win tonight is big blow to their chances with several tough games still to come.
Shkodran Mustafi run over
The German defender has notched up 22 match unbeaten run since joining the club in the summer.
He had talked before the match about staying unbeaten for the rest of the season.
He will be disappointed it ended tonight.