Liverpool icon John Aldridge has concerns facing Benfica in the Europa League quarterfinals.

In his column for the Liverpool Echo, Aldo wrote: "If you had asked me what three clubs I wanted to avoid I'd have said Benfica, Valencia and Atletico Madrid - so we're certainly in the tougher half of the draw.

"I watched Benfica when they beat Everton and they impressed me immensely. Everyone remembers how they knocked us out of the Champions League back in 2006.

"We didn't give ourselves a chance with the way we played away in the first leg. We didn't attack them, conceded and they rubbed salt into our wounds at Anfield. We owe them one."