PORTO, PORTUGAL - SEPTEMBER 29: Diego Costa (2ndR) and his teammate Cesc Fabregas (R) react defeated as Maicon Pereira (L) of FC Porto celebrates his team's second goal during the UEFA Champions League Group G match between FC Porto and Chelsea FC at Estadio do Dragao on September 29, 2015 in Porto, Portugal. (Photo by Gonzalo Arroyo Moreno/Getty Images)
