The 19-year-old made his Tottenham Hotspur debut on Wednesday.
Speaking to Tottenham Hotspur's official website, Kazaiah Sterling has revealed his delight at making his competitive debut in Wednesday's 3-0 win over APOEL Nicosia in the Champions League.
The 19-year-old striker was a surprise inclusion in Mauricio Pochettino's matchday squad for their final game in Group H and earned a two-minute cameo after replacing Dele Alli in the final stages.
And Sterling reveals that he was desperate for the ball to go out of play so he could be subbed on, and says that the Spurs manager told him to "express himself".
“I just wanted the ball to go out! I heard the crowd cheer when it finally did!," he told Tottenham's website.
"To be fair, waiting on the side felt longer than when I was warming up and the game was going on. I was very focused on the game during that time, though, and thinking about what the manager said.
"He told me to be confident, be tough, keep it simple and when there’s a chance, express yourself.”
The game was a dead rubber for Tottenham, who had already qualified for the latter stages of the competition as group winners, but presumably Pochettino's idea was to give Sterling a taste of senior competitive football and let him work toward earning more opportunities in the future.
It seems unlikely that Spurs fans will see him in the Premier League any time soon, but Pochettino's side have a third-round FA Cup visit of Wimbledon on January 6 and surely the Argentine boss will give Sterling and other fringe players another run out that day.
Until then, Sterling, a prolific scorer with the Under-23s, needs to maintain his hard work in the development squad and hope he is the biggest thing to emerge from Tottenham's academy since Harry Kane.