Glasgow Celtic defender Efe Ambrose is the subject of interest from teams in the English Premier League.&nbsp; <br /><br />Sunderland, Swansea and Liverpool in that order are understood to be in the race for the signature of the Nigeria international in the summer transfer market.<br /><br />Dudu Dahan, the Israeli agent of Ambrose, has commented on reports linking his client with a horde of clubs in the Premier League.<br /><br />''For the moment, we are not thinking and not doing anything before we speak to Celtic first.<br /><br />''Efe is under contract and is playing for one of the best clubs in the world,''Dahan told <b>allnigeriasoccer.com</b> in a telephone conversation.<br /><br />Ambrose has fully recovered from his below par performance against Juventus last week. <br /><br />The 24 - year - old netted in consecutive matches against Dundee United and St. Johnstone.<br /><br /><br />