Benfica midfielder Pablo Aimar has suggested that Chelsea are very beatable ahead of tonight's Champions League clash.
The Portuguese club host the Blues at Estadio da Luz in the quarter-final first leg and the Argentine midfielder feels that the home team have a very good chance of taking an advantage into the away fixture in what is likely to be a very even two-legged tie.
"The situation is very open and either side could go through.
"The club that gets through to the quarter-finals has not done so by luck, both Benfica and Chelsea have earned their place here."
He added: "Chelsea are developing an irregular season, but English clubs are always very dangerous and they will create problems in this match for us.
"But Chelsea have weak points in the team, but we prefer not to speak about our rivals. They have an enormous squad and it is almost like a final for us.
"Benfica, though, is playing very good at the moment. If we can practice our normal game then we can win but we need a big effort on the pitch.""I do not consider anyone to be clear favourite in this tie," he told Sky Sports.
