Henderson's stunned reaction to being hit on the head by Matip

Fans on social media reacted amusingly to Jordan Henderson's bemused look when he was playfully hit on the head by Liverpool substitute Joel Matip on Wednesday night. 

The Reds were enduring a tricky night against Inter Milan in the Champions League last-16 first-leg before Roberto Firmino's glancing header broke the deadlock at the San Siro. 

And as the Liverpool players were celebrating on the side of the pitch, captain Henderson was tapped on the head - perhaps a tad too hard - by centre back Matip, triggering a stern look from the midfielder in the direction of his team-mate. 

Just Joel Matip being Joel Matip