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		  A top-flight manager has tragically died aged 44 after suffering a heart attack during a match in 
Serbia‚ plunging the world of football into mourning. Radnicki 1923 manager Mladen Zizovic collapsed on the side of the pitch after suffering a heart attack 22 minutes into the 
Serbian club's match with Mladost on Sunday evening. His players and coaching staff were informed later in the match that Zizovic‚ who had immediately been rushed to hospital after receiving medical treatment‚ had tragically passed away - sparking heartbreaking scenes of devastation on the pitch.