Sporting have sacked Joao Pereira as manager, just six weeks after he replaced Ruben Amorim. Pereira was promoted from his role as the club's B team boss when Amorim left to take over at Manchester United . Amorim took his entire backroom staff with him to Old Trafford and tipped Pereira for the top job . But the risk to hand him his first senior job has backfire, with Pereira winning just three games. While Sporting had been top of the Primeira Liga with an unbeaten record when Amorim left ,