Manchester City intensified their bid to sign Roque Santa Cruz from Blackburn Rovers last night as Mark Hughes looked to reassert his authority over a demoralised squad.

Hughes, the City manager, has been forced to contend with a series of problems in recent weeks, having identified Tal Ben-Haim and Elano among those responsible for a growing sense of disquiet in the dressing-room. But having sent a forceful message yesterday to any disgruntled players, it emerged that City have finally established formal contact with Blackburn as they try to secure the signing of Santa Cruz in a deal worth in the region of £15 million. Reports of an £8 million bid to sign Shay Given, the unsettled Newcastle United goalkeeper, were not confirmed by City officials.

John Williams, the Blackburn chairman, was quoted as saying yesterday lunchtime that he had yet to receive a formal offer from City for Santa Cruz, but contact has since been made between the clubs at boardroom level, with Hughes hoping that a deal for the Paraguay forward can be concluded sooner rather than later.

Hughes has spoken to Paul Aldridge, the City chief operating officer, to express frustration over the time taken to complete the proposed signings of Santa Cruz, Kolo Touré, the Arsenal defender, and Scott Parker and Craig Bellamy, the West Ham United duo. City have been frustrated by West Ham’s intransigence and have indicated that they will be forced to look elsewhere if the London club, having sought to sell Calum Davenport to Bolton Wanderers and Matthew Etherington to Stoke City, do not play ball.

The City manager has other targets, having identified Joleon Lescott, of Everton, as an alternative to Touré, and, with the signing of Wayne Bridge from Chelsea completed, Hughes maintains that his squad will be far stronger by the end of the month. He hopes to offload players such as Ben-Haim and Elano, but, in the meantime, has urged the malcontents in his squad to speak directly to him.

“All the players know if they have any complaints, they can knock on my door,” Hughes said. “That is how it has always been. You are going to get these kind of stories when things are not going as well as you would like.”