Birmingham have offered new contracts to four players as they continue talks with goalkeeper Darren Randolph.
Wolves' Bakary Sako has revealed he is mulling over offers from the Premier League but is yet to decide on his future.
Arsenal shareholder Alisher Usmanov believes Manchester United striker Wayne Rooney would be a "great success" if he joined the north London club.
Gunners manager Arsene Wenger has been promised significant funds to build a squad this summer capable of mounting a sustained title challenge, with England forward Rooney among those linked as potential marquee signings, having handed in a transfer request at Old Trafford at the end of last season.
And Usmanov, who holds a 29.9 per cent share in Arsenal, reckons the unsettled 27-year-old would be a big hit at the Emirates Stadium.
He told American television channel CNBC: "(He is a) great player. If he comes it would be a big success for Arsenal and for Rooney also."
Usmanov also expressed his support for Wenger, who oversaw a strong finish to the 2012/13 campaign as the team finished fourth in the Barclays Premier League to secure a Champions League qualifying play-off place.
"My point of view is that Arsene knows best," the 59-year-old Russian added. "Of course, we as shareholders do point out some drawbacks in managing the club, in steering its way through.
"But I believe he is a great coach and he has already proven that last season."