Shkodran Mustafi was slated for his performance in Arsenal’s 2-1 defeat to Newcastle United on Sunday.Leading the criticism was Nemanja Vidic, who was on punditry duty for Sky Sports.Considering Vidic is regarded as one of the finest defenders in Premier League history, Mustafi should probably listen to what he had to say.The Arsenal centre-back lost track of Dwight Gayle and was then slow to respond as Ayoze Perez nipped in ahead of him to equalise.“Look at these two players - Mustafi and [Calum] Chambers - and their different approaches to the situation,” Vidic, who won the title five times with Manchester United, said.“If you're a defender you cannot allow yourself to do that. He's just looking at the ball, he doesn't know what's going on around him."It was a dismal afternoon for the German defender, with many fans expressing their bewilderment that Arsenal actually paid £35 million to sign him.

Firmino/Mustafi stat

One stat has emerged and it really does say a lot about the effort Arsene Wenger is getting out of his players compared with Jurgen Klopp at Liverpool, who have a Champions League semi-final to look forward to.

Per Squawka’s Jake Entwistle, Roberto Firmino (62) has won more tackles than Mustafi (61) in the league this season.

Firmino is, of course, redefining what it means to be a striker in the modern era. He is among the hardest-working players in Europe; the perfect player to carry out Klopp’s intense demands.

The stat probably says more about him that it does about Mustafi. The Brazilian attacker never stops, constantly harassing defenders and causing mistakes.

It was something that Jamie Carragher pointed out in February.

"There is something about South American players,” Carragher told Sky Sports. “They just seem to be able to keep going.

“Klopp said recently that Firmino has one rest day after a game and then he's back on it in training and that's exactly how Luis Suarez was.

“He never wanted a rest even in training. That is just how some people's bodies are - they seem to be able to deal with anything."

Mohamed Salah is getting all the praise right now, but it’s impossible not to talk about Firmino too.