Modric joined Spurs for £15m from Dinamo Zagreb in April 2008
Spurs will be without Luka Modric for at least six weeks after the midfielder fractured a bone in his leg during the 2-1 win over Birmingham on Saturday.
The Croatian international was forced to withdraw from the match at White Hart Lane just after half-time.
Subsequent X-rays have revealed that the 23-year-old has sustained a fracture to his right fibula.
The injury rules him out of Croatia's World Cup qualifying match with England at Wembley on 9 September.
"Luka Modric suffered a fracture to his fibula on Saturday which does not require surgery and simply requires the wearing of an aircast protective boot," read a statement on the Tottenham club website.
"It is anticipated Luka will be back in training after six weeks."
Modric has been a key player so far this season for Tottenham, who have a 100% record after five matches and are currently joint top of the Premier League table with London rivals Chelsea.
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