And the pundit thinks that is exactly what the north London side don't do enough of - and is therefore their biggest problem right now.
Souness told Sky: "Arsene Wenger commented on the lack of confidence prior to the game at the Vitality Stadium but, I'm sorry, the big players he's got should be helping out the rest of the team.
"Do Arsenal have enough of these players to see them through the sticky spells? On past history, you'd have to say the answer is no, and that could be their undoing again. They don't have enough mettle in their team."
There really is a huge emphasis on the Gunners' clash with Leicester City this weekend. However, the fact Arsenal are at the Emirates could suit them.
Arsene Wenger needs to get a hold of himself and counter Leicester's strengths. It's the Foxes who are top of the Premier League table not Arsenal, so it should be the north London side playing to stop Leicester not the other way around.
Everyone raves about Leicester's counterattacking game - so why aren't managers who are paid millions of pounds a year doing anything to stop them?
What's the bet Wenger will say there was nothing Arsenal could do with their possession-based game against Leicester's pace at the full-time whistle...?