Town boss Mick McCarthy says midfielder Jonathan Douglas has been excellent from the moment he joined the Blues on a free transfer from Brentford in the summer.
The 34-year-old has now made 16 starts and three sub appearances and scored his first two goals for the Blues in the back-to-back Rotherham and Wolves games last month.
"Jonny’s been excellent from walking through the door,” McCarthy said. "He’s another one that’s a really good character, is low maintenance, just comes in, does his job and understands the game.
"He’s old enough to understand the game, of course. He does his job, he’s just what it says on the tin, Jonny.
"He’s 34 but he outruns every player every week on the stats. The distance he covers tells you something. But he’s a clever footballer and the third goal at Charlton summed him up.
"Brett Pitman left it but he was aware of where Murph was and picked him out for his second. Delighted with Jonny, he’s great.”
Douglas came into the team soon after signing for the club with the Blues short of central midfield players as Kevin Bru joined Luke Hyam and Teddy Bishop in the opening weeks of the season.
But not everyone immediately took to the former Irish international, reminds McCarthy: "He was an easy one to pick on because he’d just walked in and Kevin Bru got injured and he’s a fans’ favourite.
"Suddenly we weren’t winning games and Dougie was getting it in his ear hole. Let’s clear all that up, let’s not beat around the bush, that is just the way it was.
"Then Dougie scored up at Rotherham and he’s been in the team and he got another goal against Wolves. He’s been great all the time, he’s played very, very well.
"We’re a fickle lot, all of us, aren’t we? When it’s going well, he’s great. Let’s hope that continues.”