The former Leeds United and Middlesbrough manager was sworn in at Birmingham City this week.
Marvin Johnson has been linked with the likes of Hull City and Leeds United this summer.
Hull make first move in pursuit of Oxford's Marvin Johnson with a £1m bid for the Leeds target.
Oxford United are unwilling to sell Marvin Johnson amid reported Leeds interest.
Hull and Leeds both keen on Oxford's Marvin Johnson.
Aston Villa and Birmingham City have reportedly shown an interest in the player, but Leicester have 'stepped up' their pursuit.
Brendan Rodgers' pulling power could come to the fore again as Celtic aim to fight off Everton and Liverpool for Oxford United's Marvin Johnson.
Celtic are just one of many clubs interested in the Oxford United winger - but Rangers know just how good he can be.
Celtic and Manchester City have reportedly joined the race to sign Oxford United star Marvin Johnson.
Aston Villa and West Bromwich Albion are among the clubs linked with moves for Oxford United's Johnson.