When Manchester United made the bold decision to sack Jose Mourinho on December 18, they were 11 points below the Premier League top four.But now, with Ole Gunnar Solskjaer in charge and four games under his belt, the Red Devils have closed the gap to five points.Wednesday night's 2-0 victory away to Newcastle was United's fourth on the bounce and it was the same old names who delivered.Romelu Lukaku broke the deadlock just 40 seconds after coming on before Marcus Rashford, whose free-kick set up the first, made it 2-0 with 10 minutes remaining.Paul Pogba could have got himself on the scoresheet in the closing stages, too, but found the side netting when he took the ball around Newcastle goalkeeper Martin Dubravka.The Frenchman has been phenomenal under Solskjaer and once again dictated play in the middle at St James' Park.He was involved in a rather nasty incident, though, when Jonjo Shelvey raked his studs down the back of his leg. Check it out below.

Shelvey somehow escaped punishment for his naughty challenge - not even a yellow card was given - and Pogba was visibly furious.

So what did the United man do? He got his revenge, of course.

Moments later, when Shelvey received the ball from Dubravka, Pogba clattered into the Englishman to send him sprawling and give away a free-kick.

And now he seems to have mocked Shelvey on Twitter by posting a picture of him revealing the mark on his leg with the caption: "Great win to start 2019 🙌🏾⭐...caption this ...🤣."

Pogba reportedly left the stadium limping and needed treatment on United's team bus, which United fans will hope is nothing serious.