While Tottenham maintain that Modric is not for sale Nikky Vuksan, Modric's representative, said the Croatian would consider an offer from United if the north London club allowed him to do so.
"Exactly. If that was the Spurs position then we would be happy to sit with the club and discuss for the future," Vuksan told the Guardian, before being careful to emphasise Modric is not agitating for a move.
"He's happy at Spurs. Any offer that comes [in] for him, it's up to the decision of Tottenham Hotspur if they want to reject it or accept it. We have a great partnership with Tottenham and there's not been [any] activity on our behalf that we would do on our own.
"Everything is in coordination with Spurs, and it's all up to the chairman, Daniel Levy, to decide. [Luka's] under contract, he's happy there [and] he's willing to try to win the Premiership with Spurs and play Champions League [the] next season."
Yet despite that, Vuksan conceded that Modric wants to play in the Champions League each season, a prospect not on offer for him from Tottenham in the next campaign.
"Of course. He loves the Champions League experience, it was a great honour for Sir Alex to say something like this and he uses it only as a motivation to continue on such a level," he said.
Asked how Modric reacted when he was told of the bid from Chelsea, Vuksan said: "I'm sorry it's inappropriate for me to say what he thinks about it. Obviously he respects the decision of the club [to turn the offer down]."