Arsenal boss Arsene Wenger has questioned the claims over Chelsea striker Diego Costa's hamstring injury.
It was put to Wenger that Jose Mourinho might be applying a smokescreen in his regular comments about the allegedly fragile hamstrings of his striker.
Arsenal's manager smiled at the suggestions before today's clash at Stamford Bridge, saying: "Honestly, when you see him play it is not obvious (that he has an injury).
"He has had a problem with his hamstring for a long time and we saw that in the Champions League final but when I have seen him recently, it is difficult to guess that he has a hamstring problem."
