Oscar had a good time during his four-year stay at Chelsea before moving to Chinese League side Shanghai SIPG.
The 26-year-old has revealed that away games against Manchester City and Manchester United were usually the toughest for the team.
“The classics against Tottenham and against Arsenal are the two coolest classics to play away from home,” the former Chelsea midfielder told PL Brasil.
He also revealed that he usually did well in the London derbies against Arsenal and Tottenham.
He added: “But I always did well, especially against Arsenal, I always played well. Against Tottenham too, we always scored against them. “But the teams that were very difficult to play against, away from home, were Manchester City and Manchester United. I think it’s the two games that were very difficult to face off.”