Former Chelsea assistant coach Jose Morais believes Porto can upset the Blues in their Champions League quarterfinal.
Porto host the first-leg this week and Morais, who was on Jose Mourinho's staff at Chelsea, can see Sergio Conceicao's players pulling off an upset.
He told O Jogo: "I am a bit divided here and I would like Chelsea to have positive results. Ask what I prefer, as a Portuguese I prefer a Portuguese team to win.
"What is comparable is FC Porto as an organisation and a demanding mental attitude. Any coach who passes by has the obligation to embody these values and be able to pass them on to the players. I believe that Mourinho did it and Sérgio is doing it.
"He may have received some influence in the way of training, but, in the rest, they are different personalities, moments and teams. There is no way to compare."
