Robin van Persie won 30 of his 58 games in charge of Feyenoord [Getty Images]Feyenoord have sacked manager Robin van Persie after just 16 months in charge of the Eredivisie club.The former Arsenal and Manchester United striker guided the club to a second-place finish and Champions League qualification in his only full season as manager, though they finished 19 points behind winners PSV Eindhoven.The 42-year-old departs just two weeks after Devy Rigaux's appointment as technical director and Robe