HITC Sport understands a quartet of clubs have joined Derby in the chase for Preston attacker Robinson.
Derby have been leading the hunt for Robinson and saw a bid for the former Aston Villa youngster turned down last week.
Preston are determined to keep hold of their prize asset, but are now bracing themselves for futher offers for Robinson with Premier League and Championship clubs weighing up moves for the England Under-20 international.
Premier League duo Crystal Palace and Burnley are monitoring Robinson's situation at Deepdale as they look to strengthen their attacking options, while Championship pair Fulham and Bristol City are also admirers of the skilful attacking midfielder.
Robinson joined Preston last summer from Aston Villa on a permanent basis, after spending three spells at the club on loan.
The 22-year-old scored 11 goals in all competitions last season, including Preston's goal in the narrow FA Cup defeat to Arsenal last January.
Preston do not want to lose Robinson this summer, but they are facing an increased battle to resist the interest from Robinson's growing list of suitors before the close of the transfer window.