He's already accumulated five yellow cards in as many games this A-League season but Perth Glory skipper Jacob Burns insists his form would suffer if he mellowed out.Burns was forced to serve a mandatory one-match ban last week as Glory slumped to a 1-0 loss to Melbourne Victory.The 34-year-old will return to action in Saturday night's clash with Melbourne Heart at AAMI Park, but he vowed on Thursday to stick by his hard-nosed approach."I play the game in a manner that's served me well throughout my whole career," said Burns, who played for Leeds, Barnsley, Wisla Krakow and Unirea Urziceni before linking up with Perth in 2009."If I went into games thinking about cards that are hanging over my head, I wouldn't be the same player."So I will not change a thing about my game."Fergie (coach Ian Ferguson) knows the kind of player I am. He's mentioned that he'll never ask me to change as a player."People that play my position are making more tackles than anyone else."Added to that, I'm the captain and leader of the club."I feel a responsibility to ask questions, sometimes referees don't tend to like that."But I'm still going to go about my business."Glory midfielder Liam Miller, who missed last week's match with a back injury, is almost certain to miss the match against Heart, who sit in second last spot but are just two points adrift of sixth-placed Perth.