Ipswich Town manager Mick McCarthy has warned against under-estimating sixth-bottom Rotherham United today as the in-form Blues go in search of their fourth straight Championship victory.

Seventh-placed Town followed up home wins against Millwall and Brighton with victory at Wigan on Monday, and could go second-top should results go their way.

McCarthy admitted Town’s upturn in form will have created a feel-good factor at Portman Road but predicted the Millers clash would be his team’s toughest yet.

“Winning does help confidence for all of us and gives an optimism around the town and there will be optimism at the ground tomorrow,” said McCarthy, who has signed ex-West Ham midfielder Jack Collison, on a deal until the end of December.

“That’s got to be tempered slightly as Rotherham are no mugs and it will be a really hard game.

“Suddenly everyone is thinking, ‘it’s Rotherham at home, we will win’, but it does not work like that.

“It (winning games) certainly helps. It helps the spirit, it helps individually how you feel about yourself and certainly collectively as a team.

“We have just won three on the bounce but Rotherham are a team with momentum, who have won back-to-back promotions. Their results have been a bit mixed but their performances have been pretty good. They have got a bit of spirit about them and this will be our toughest of the lot.”

Rotherham could field former Ipswich trio Scott Loach, Paul Green and Frazer Richardson in their team today, the latter two having impressed on loan at Portman Road last season.

“I would sign them on loan, but I was not going to sign them (permanently, in the summer),” explained McCarthy.

“They had a really good offer (from Rotherham), the location does suit and I was not going to get involved with that.

“They are top signings for Rotherham but I have got Elliott (Hewitt) who was there (at right-back) and, as for Greeny, we have Teddy Bishop, Cole Skuse and Luke Hyam in midfield, so we have got bodies.”