Mauricio Pochettino has urged his Tottenham Hotspur team to learn from their disappointment in the Champions League final.
Spurs reached the Champions League final for the first time in their history, but were eventually beaten 2-0 by Liverpool in Madrid.
The coach believes Spurs still have work to do before the season begins next month.
He said: "Of course you are always disappointed when you don't win. We always expect to win.
"I think the season was unbelievable. I congratulate Liverpool but you always feel disappointed. You need to learn from the pain when you are not able to win.
"For [Liverpool and City] the challenge is to keep the level and for us the challenge is to reduce the gap.
"It's a massive challenge to reduce the gap. We will see what happens. They were so strong and with great quality. The Premier League is the most competitive league."