Branislav Ivanovic thinks Serbia have the quality to defeat Portugal on Sunday despite their opponents having "one of the best players in history" in Cristiano Ronaldo.
Serbia sit fourth in Group I of Euro 2016 qualifying, having suffered a three-point deduction for unsavoury scenes in October's match against Albania, and need a win to get back on track.
Group favourites Portugal are their hosts this weekend and Ivanovic is not underestimating the size of the task awaiting his side in Lisbon, where Ballon d'Or holder Ronaldo will be expected to dictate proceedings.
