Shane Duffy's mental strength will get him through his poor run of Celtic form. The former Hoops boss was Duffy's manager at international level with the Republic of Ireland and he revealed that Duffy used to analyse every part of his performance and be frustrated even if the team won.
And he reckons that's the kind of rigorous approach that will push him on at Celtic and allow him to recover from his poor start to be a success at the club.
O'Neill also insists the return of key players such as Odsonne Edouard will eventually see Neil Lennon's men hit top form and put real pressure on Rangers.
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