QPR's first top flight game at Loftus Road since 1996 ended with a disappointing 4-0 defeat by Bolton - and what appeared to be a serious injury for Kieron Dyer.
Last season's npower Championship winners had started brightly, with summer signing DJ Campbell seeing an effort ruled out for offside, before Dyer, signed on a free transfer from West Ham, fell awkwardly and had to be carried off with a reported broken metatarsal.
Bolton took the lead on the stroke of half-time with a fine curling effort from centre-back Gary Cahill, with an own goal from Danny Gabbidon and Kevin Davies' deflected strike settling matters ahead of a fourth for Fabrice Muamba on the break. Defender Clint Hill was shown a red card in stoppage time.
Last season's npower Championship winners had started brightly, summer signing Campbell seeing an effort ruled out for offside. But in a sign of the afternoon ahead Dyer, signed on a free transfer from West Ham, fell awkwardly after just five minutes and had to be carried off with a reported broken metatarsal.
Dyer, who has completed 90 minutes only once in his last 29 Premier League matches, stretched for a 50/50 challenge and landed awkwardly, leading to extensive treatment before the former England midfielder had to be carried off on a stretcher, his foot already in a protective boot.
Bolton took the lead on the stroke of half-time with a fine curling effort from Cahill. The defender, a reported target for Arsenal, took one touch before curling a sublime effort into the top left corner.
QPR had a chance of equalising after 56 minutes when QPR captain Adel Taarabt, who had been linked with a big-money move away during the summer, finally found some space on the edge of the Bolton area, but his shot flew wide.
The unfortunate Gabbidon, making his debut, put the ball in his own net after 68 minutes, deflecting a Chris Eagles cross.
Klasnic made it 3-0 when he drilled home via a deflected effort off Bradley Orr after a knockdown from Kevin Davies with 20 minutes remaining.
Muamba swept in number four after a flowing counter-attack and QPR's miserable day was compounded when Hill was shown a straight red card for pushing his head into Martin Petrov's chest as the pair tussled on the near touchline during stoppage time.