Bolton manager Gary Megson has said he believes new signing Tamir Cohen can make a significant contribution to the English Premier League side. The Trotters face Derby County at the Reebok Stadium on Wednesday evening, although the Israeli midfielder is unlikely to feature. Cohen, the son of former Liverpool player Avi Cohen, agreed to terms with Bolton 10 days ago but the club was only able to officially announce the move once the transfer window had opened. Megson, who took over from Sammy Lee as manager in October, has had a run of impressive results, pulling Bolton out of the relegation zone. "I'm really pleased to be able to add someone of Tamir's potential to our squad," he told the official Bolton club Web site. "He's been training with us and has already met the lads. "He will need to get used to the demands of the Barclays Premier League like all new players but I am certain he will be a valuable asset for this football club." Bolton paid an estimated $75,000 for the transfer, meeting the 23-year-old's buy-out clause at Maccabi Netanya. Cohen was Wanderers' first signing of the transfer window. In a statement, the club said he has agreed to personal terms and will pen a two-and-a-half-year deal subject to international clearance. Although he only made his international debut for Israel in October he has already won three caps.