The Blues have reportedly gone back to Spurs with a ?27million bid for Modric after seeing their initial offer of ?22million rejected last month.
Both Tottenham and Chelsea have refused to confirm officially whether a second bid has been lodged, but it is understood that Spurs are deeply unhappy with their London rivals' pursuit of the former Dinamo Zagreb midfielder, who is 14 months into a six-year contract.
Modric has stated in three interviews in recent few weeks that he is determined to leave White Hart Lane and complete a "dream" move to Chelsea, who can offer him the Champions League football that Spurs can't.
The latest interview he gave on Saturday with a Croatian newspaper has infuriated Spurs fans. The 25-year-old accused chairman Daniel Levy of being "arrogant" and of reneging on a deal that would allow him to leave Tottenham if a big club came in with a reasonable bid for the star.
Despite the stinging personal attack, Levy has not altered his stance with Modric and the club fully expect him to board the plane for South Africa when it leaves on Wednesday afternoon.
The club are adamant that all their first-team squad will fly to the country, where they are scheduled to play in a tournament with Kaizer Chiefs and Orlando Pirates. Spurs' first match is on Saturday.
Modric's representative Nikki Arthur Vuksan confirmed the player will be going on the trip.
"Of course Luka will be going to South Africa. He is a Tottenham player and he has a contract there," he said.
Source: Team Talk
Source: Team Talk