BYRON Webster will increase competition for places in Millwall's back four but he is not guaranteed a starting berth, according to boss Ian Holloway.
The Lions manager insists that Webster, signed from Yeovil Town on a free transfer, has not been brought in to replace any of the club's existing centre backs.
Alan Dunne and Mark Beevers ended last season as Millwall's first-choice pairing, but Danny Shittu and Paul Robinson are back in contention.
Asked whether Webster will go straight into the side, Holloway said: "I'll asses that as I go.
"We can't be as leaky as we were last year. If I pick the same back four as last season, they'll need more competition so that they play better.
"We need to change our mindset so that the players are always on their toes.
"Are we a team that's always going to be fighting to stay up, or do we believe we can be better than that and push towards the other end of the table?
"Shittu and Robinson had quite challenging injuries to get over or ailments to carry, but they'll have as good a chance as anybody if I deem it that way."
On Webster, Holloway added: "He's a good type – 6ft 3in, good on the ball and he wants to improve.
"He will strengthen my choices in our defence and also gives me the option to go three at the back, which some teams have done really well at the World Cup."
Webster, who has joined his new teammates on a pre-season training camp in Portugal, hopes to make an impact at both ends of the field in the coming campaign.
"I like to get the ball down and play a bit," the 27-year-old said.
"I scored four in the Championship and five the year before – so I definitely like to be a threat at set pieces.
"One criticism of myself is that I don't score more but I do tend to pop up with a few each season.
"There's a lot of competition at centre back and the manager told me that before I came here.
"But that was an attraction for me – I could have gone somewhere where my place in the starting XI was guaranteed, but I'm eager to impress here."
Meanwhile, Holloway has confirmed that, to his knowledge, Rotherham have ended their interest in Beevers after having a £100,000-offer rejected.
"They've gone totally quiet," the Lions boss said.
"I haven't spoken to Beevers about it and why would I want to talk to him about a bit that would have seen us make a 50 percent loss?
"They offered £100,000 and we bought him for £300,000.
"He finished the season strongly and he's still only 24 so I won't be looking to sell him. I really like him."