Manchester United striker Robin van Persie believes that the Champions League is still wide open as he feels that eight or ten teams are strong enough to win the title this year.
According to the Mirror, United have won all of their previous four games against Olympiakos, but United's Ryan Giggs feels that they would still be formidable opponents.
The Dutch striker, ahead of United's first leg of their last-16 clash with Olympiakos F.C., said that at this stage of the competition there would be no easy match and also added that Olympiakos had a strong team.