LISBON, Portugal — The successor to Ruben Amorim at Sporting Lisbon lasted just six weeks. João Pereira, who was hired on Nov. 11 following the departure of Amorim to Manchester United, was fired on Thursday and has been replaced by Rui Borges from Vitoria de Guimaraes. Pereira had three spells at Sporting as a player and took over as coach …