Thijssen is keen to add 25 year-old who would add further steel to the club's shaky rearguard.

"I hope in the next couple of days there is more news about other players," Thijssen said.

"We have a lot of young players and it's great to work with young players, but in the end results are important for every club, and it's always quicker to get results when you improve the team with more quality."

German full-back Polenz signed a two-and-a-half year deal with Roar and will take over the No.2 jersey vacated by recently-departed club captain Matt Smith.

Polenz, 28, played 47 times for the Wanderers and his departure from that club was a surprise after two quality years on the right side of defence.

But he said he had no desire to prove Western Sydney coach Tony Popovic wrong for failing to meet his asking price.

"We were too far apart, so I had to leave," he said.

"They gave me the best time of my career, and the most successful time of my career.

"I'm really thankful to have had this opportunity at the Wanderers and I learnt a lot under Tony Popovic.

"I have a close bond to them, but now I am a Brisbane Roar player and I'll give everything to make this club successful again."

Polenz wore his heart on his sleeve for the Wanderers and was often outspoken, once declaring that Brisbane "feared the power" of Western Sydney.

"I cannot change the person I am," he said.

"Definitely, Brisbane Roar fans can expect things like that.

"I will keep on playing like I used to play - I am a hard player. And off-field, I will still be the same person."

Polenz is the first of a series of signings expected from Brisbane during the A-League's Asian Cup-enforced recess.