Cameroon battled back from two goals down to draw a six-goal thriller with Serbia in Group G.
Cameroon took the lead through Jean-Charles Castelletto but Strahinja Pavlovic and Sergej Milinkovic-Savic hit back for Serbia before half time.
Vincent Aboubakar and Eric Maxim Choupo-Moting struck as Cameroon and Serbia both picked up their first point in Group G ahead of the later game between Brazil and Switzerland.