Arsenal defender Kieran Tierney endured a 'nightmare' up against Liverpool star Mohamed Salah, according to Sky Sports pundits Roy Keane and Jamie Carragher.

Salah was instrumental in Liverpool's equalising goal, taking control of a loose ball, working his way into the box and firing off a shot at goalkeeper Bernd Leno.

The German made the save but Sadio Mane was first to react to the rebound and turned it home to put the Reds back on level terms after Alexandre Lacazette had capitalised on an Andy Robertson error to give the Gunners the lead.

Robertson later made amends for his error, giving Liverpool the lead before the end of the first-half, before new signing Diogo Jota wrapped up all three points with a goal on debut to earn them a 3-1 win.

Liverpool forward Mohamed Salah was "causing nightmares" for Arsenal's Kieran Tierney during their clash, claimed Roy Keane

Analysing the game at half-time, Keane and Carragher looked at Liverpool's equaliser and the problems Salah had caused for Tierney.

"Like any good team, Liverpool responded very quickly," Keane said. "Salah has been causing nightmares for Tierney and it's the least they deserved [the equaliser].

"The keeper should probably do better with the initial shot. Tierney had to keep him on the outside and then Leno has to do better."

Sadio Mane scored Liverpool's equaliser after Salah had a shot saved by Bernd Leno

Carragher added: "Tierney can't cope with Salah on this left side and the second goal again comes from that. Maitland-Niles is getting high up the pitch so Tierney is often found in the full-back area.

"The delivery from Trent Alexander-Arnold has been fantastic and Robertson makes up for his mistake at the other end.

"There's a problem on that left side for Arsenal that they need to sort out."

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Tierney was also involved in an incident with Mane in the first-half where the Senegalese forward caught him in the face with his arm.

Mane was attempting to shield the ball from the Scotland international but elbowed him in the process, which could have seen him given a straight red card.

However, referee Craig Pawson opted for a yellow instead.