West Ham manager Alan Curbishley insists he is not expecting any problems when old sparring partners Kieron Dyer and Lee Bowyer are reunited at Upton Park. Dyer finally completed his protracted transfer from Newcastle yesterday for an undisclosed fee, signing a four-year deal and linking up with fellow ex-Magpies Craig Bellamy and Scott Parker. But it is his reunion with Bowyer, with whom he infamously traded blows on the pitch while both were playing for Newcastle against Aston Villa in 2005, which has raised eyebrows among the Hammers faithful. Curbishley made Dyer his sixth summer signing despite Sheffield United announcing they are suing the Hammers for up to £50million over the Carlos Tevez affair. And the Upton Park chief is confident the pair's spat is water under the bridge as he prepares to hand Dyer an immediate debut, possibly alongside Bowyer, at Birmingham on Saturday. 'I spoke to both players and have been assured that it was a one-off, and they both actually speak to each other regularly,' said Curbishley. 'It was just two players desperate to do well. They were getting well beaten, and it just boiled over.' Curbishley was delighted to finally get his man some 10 days after Dyer's original transfer collapsed when Newcastle upped their valuation from £6million. And he is backing Dyer to recapture the form which, when fit, makes him a regular member of the England squad. 'We're trying to build a squad here. We are short in the middle, and Kieron can play that position,' added Curbishley. 'Newcastle changed it at the last minute before - when he was just walking in the door - so that was disappointing. 'But common sense has prevailed; Kieron is looking forward to joining us, and Newcastle go down their route. 'Every player you sign has risks - and he is no different. I hope he hits the ground running and shows everyone what a good player he is. 'Kieron's got to make up for a bit of lost time, and I hope he does. We're delighted to have him on board.' Curbishley also revealed Derby had rejected West Ham's latest approach for teenage winger Giles Barnes, while any move for Eidur Gudjohnsen is on hold while the Barcelona player struggles to get fit. 'The transfer window is still open, and we are still active. We're still short in one or two areas,' he added.