Manager Jose Mourinho refused to speculate on Tottenham being in talks with Gareth Bale, and described his squad as a puzzle.
Spurs are in talks to re-sign Bale, who joined Real for a then-world record £85m in 2013.
The Portuguese previously told Tottenham chairman Daniel Levy that he "needs a striker" before 5 October.
"A squad is a puzzle and when a new signing completes the puzzle, it's great for the team," said Mourinho.
Tottenham were beaten 1-0 at home by Everton in their first game of the new Premier League season on Sunday.