Boogaard stunned by Kosmina exit

Adelaide United defender Nigel Boogaard said he holds no ill feeling towards John Kosmina despite the manager's shock exit from the club.

Adelaide United defender Nigel Boogaard said he holds no ill feeling towards John Kosmina despite the manager's shock exit from the club.

Kosmina handed in his resignation on Monday following concerns with a 'lack of trust' from Adelaide's board, and was replaced by assistant coach Michael Valkanis until the end of the season.

The sudden departure came just 72 hours after United fell to a 3-1 loss to league leaders Central Coast and dropped to fourth on the Hyundai A-League table.

Boogaard admitted to being blindsided by the announcement but was not bitter about Kosmina's decision, despite the Reds closing in on finals action with nine games remaining in the season.

"To be honest I didn't see it coming, but that's professional sport and it's like that all around the world," Boogaard said.

"It's maybe not (good) for the fans, but it's a personal decision, he stuck by it and he's got his reasons.

"Whether it's right or wrong it's his decision and it's not my place to say.

"Our job (as players) it's not to look too far into the reasons why."

Part of Kosmina's choice to leave also stemmed from suspicions his right-hand man Valkanis was in cahoots with United's board to overthrow the former Sydney FC coach.

Kosmina approached Valkanis following the loss to the Mariners and questioned the 38-year-old regarding speculation to whether he had been asked by the board to take over the head coaching role.

Valkanis flatly denied the accusations but suggested tension had crept into the relationship with his long-time mentor.

Boogaard said he was not aware of any issues between the pair.

"To be honest, we don't read into anything like that. You hear everything around here ... rumours here, there and everywhere about everything," Boogaard said.

"But if you read into anything it consumes you and you are unable to do your job, and that's like in any workplace.

"I think most of the boys see it as it is and just get on with our job."

Valkanis' official reign as interim coach begins on Sunday when the Reds tackle the Western Sydney Wanderers at Hindmarsh Stadium.

Boogaard hoped an inspired week on the training track, that has seen the squad eager to impress Valkanis, would be an advantage against Western Sydney.

"We are looking forward to the challenge, obviously Michael Valkanis is in here for the rest of the season and with every new coach the intensity lifts at training," Boogaard said.

"The boys have got to prove themselves and it's almost like a clean slate again, so training has been good the past couple of days in preparation for the game.

"With every new coach regardless of what sport it is there's always that factor of everyone trying to prove themselves and hopefully that works in our favour this weekend."

The former Central Coast stopper said the Reds are also motivated to avenge the 6-1 drubbing at the hands of the Wanderers when the two sides last met in December.

"That was a pants-down moment. It was not a good situation and no one likes that in sport," Boogaard said.

"There's obviously motivation there but I think there's more motivation in getting three points to climb the ladder."