Tottenham and England right-back Kyle Walker has undergone lower abdominal surgery, his club have announced.
The 24-year-old has not played for Spurs since March, and no timescale was put on his recovery in a brief statement on www.tottenhamhotspur.com on Tuesday evening.
"Kyle Walker has undergone lower abdominal surgery," it read.
"The England right-back's pre-season preparations were disrupted by the abdominal injury and the decision to have surgery was taken following further medical assessment by specialists."
The north London club had initially hoped to avoid surgery, but resorted to sending the player for an operation in a bid to fix the long-standing problem.
"Kyle is good some days. On other days he has a bad feeling," boss Mauricio Pochettino said last month.
"We believe he may recover soon, but we need to be calm with him because it is an injury that he has had for five months."