Jeffrey Schlupp has been removed from Leicester's squad for their English Premier League opener against Hull on Saturday after a third bid from West Bromwich Albion.
West Brom made a third increased bid in the region of £12m for the Ghanaian speedster in hope of solving the problems down their left side.
Leicester have already turned down a £9m offer from the West Midlands club, but the Baggies have significantly upped their offer in the hope of prising the 23-year-old away.
Schlupp, who joined the Foxes 11 years ago, has been told by manager Claudio Ranieri he may need to leave the club in order to play regular first-team football.
The Ghana international made 24 Premier League appearances as Leicester won the title last season, scoring one goal.
Schlupp signed a new four-year deal last summer at the King Power Stadium, but faces competition from the likes of Riyad Mahrez and Marc Albrighton on the wings.
West Brom boss Tony Pulis has stated his intention of signing five new players before the transfer window closes and it appears Schlupp is high on his list of targets.