John Hartson believes Edinson Cavani's profligacy in front of goal was the only reason Arsenal claimed a draw against PSG on Tuesday night.

The Uruguayan striker gave the French giants the lead within 42 seconds of their Champions League Group A fixture with the Gunners at Parc des Princes by heading home Serge Aurier's cross.

Cavani had a host of other chances to put Unai Emery's side further in front but was unable to beat David Ospina before Arsenal levelled through Alexis Sanchez in the 78th minute.

Former Gunners striker Hartson said on BT Sport that Cavani was Arsenal's saving grace due to his inefficiency and Arsene Wenger should be grateful he left this scoring boots at home on the night.

"The man Arsenal have to thank on the night was Cavani," Hartson said.

"On another night, he gets a hat-trick. He leads the line very well, he makes good runs.

"For the amount of good chances he gets... he normally needs three chances to score a goal. If he was a natural, more comfortable in front of goal… I think he'd be one of the best strikers in the world.

"He's not composed. He's a top centre forward around the world but if he was a more natural goalscorer it would put millions on his head."