Aleksandar Kolarov responded to recent criticism of Roma's performances by asserting that football fans know nothing about the game's intricacies.
Following Saturday's 1-0 loss to Udinese, doubts have been raised over Eusebio di Francesco's tactical plan.
In the lead-up to Tuesday's Champions League matchup with Real Madrid, the Serbian defender was quick to rubbish those doubts in response to whether an improvement can be guaranteed.
"I don't have to promise anything to anybody, only to myself in terms of working hard and giving everything, and that's what I have always done since I started playing football," Kolarov said.