Striker Mido believes he should not have joined Spurs on a permanent deal.
Mido found it hard to get into the first team
The 24-year-old had spent 18 months on loan from Roma before opting to commit to Tottenham a year ago.
The Egypt international made only seven league starts this season, with injury and competition from other strikers hampering his first-team chances.
"I am not happy at Spurs. I made a big mistake when I signed permanently. I know this could result in problems," he told Egyptian television.
Mido had been linked with a move to Celta Vigo last season and was close to signing for Manchester City last January.
But he opted to stay with the north London club and re-assess his future in the summer.