The Sunday Mirror says Tottenham chairman Daniel Levy is set to report the Blues to the Premier League. He warned Chelsea in writing not to pursue Modric and has now accused them of making public a bid for the player in order to unsettle him.
Chelsea have form for making illegal approaches. In 2005, they were fined £300,000 and given a three-point suspended penalty by an independent Premier League commission over Ashley Cole's recruitment from Arsenal.
They were also found guilty by FIFA of making an illegal approach for Gael Kakuta in 2009. Initially that sparked an international transfer ban which was eventually lifted.
Spurs will raise this with the Premier League. And any future tribunal is sure to take into consideration Chelsea's previous history.