The Belgium international said: “Will I leave Chelsea this summer? I won’t say yes, but I won’t say no either.
“I don’t know. I still have three years left on my contract, and we will have to see what Chelsea want to do.
“We have games every three days over here, and no winter break. There are numerous cup competitions to play in, and we have to stay overnight in hotels before matches.
“The matches are played at a high tempo and there are some hefty collisions.
“Sometimes I watch my matches on TV that same evening, and get a shudder when I see myself rushing out into some situations.”