Aston Villa boss Martin O'Neill is set to make Carlos Cuellar his sixth summer signing - but he has no intention of stopping there.Villa have agreed a £7.8million fee with Rangers for the Spanish defender and he is set to follow in the footsteps of Steve Sidwell, Brad Friedel, Brad Guzan, Nicky Shorey and Luke Young, who have all joined the club this summer.

O'Neill, though, insists his reinforcements will not stop with the addition of Cuellar.

"If we're going to try and compete, even at Premier League level let alone Europe, we need a decent squad. So we need to keep adding quality if we can," O'Neill told the club's official website.

"We've lost Freddie Bouma and we were quite thin on the ground before that. That sort of injury can happen at any given minute. Therefore we need to try and safeguard as much as we can.

"What we've done is bring in a recognised right-back and a recognised left-back to help us. We didn't have the right-back last year but it wasn't for lack of trying.

"We've not finished. We'll still have some players coming in to give us a chance and if we're lucky enough to qualify for the group stages of the UEFA Cup that would take us right up to Christmas and we'll most definitely need the squad.

"Last season we were exceptionally lucky with injuries. Eight or nine players played over 30 games and we didn't have big runs in the FA or League Cup - therefore we were able to concentrate on the League.

"All that could change this season and the fact is that we need the squad to be bigger to cope with that. That's what we're trying to do."

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