Fernando Llorente admits it is hard playing as back-up to Harry Kane but revelled in his "dream" winning goal for Tottenham against Watford.
Llorente has been thrust into the limelight at Spurs following Kane's recent ankle injury and the Spaniard has experienced mixed fortunes across his four games in the side.
He scored an own goal at Fulham, but then got a goal at the right end to send the Carabao Cup semi-final with Chelsea to penalties.
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The 33-year-old then shrugged off a shocking miss against the Hornets, where he skied over from three yards, to score an 87th-minute header which gave Spurs a late comeback win.
Llorente was making just his third Premier League start for the club in 18 months and accepts life at Spurs has been a struggle.
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"It's really difficult because Harry is one of the best in the world," he said.
"The most difficult thing is to be fit when you don't play because the only way to be fit is to play 90 minutes.
"Training is important but the game is the game. Now I feel every game, I feel much better. Today I feel good. Now I'm very focused to help the train and do my best.
"It is probably the most important goal I have scored here at Tottenham [against Watford]. It was my dream.
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"When you dream of days like this and finally it happens, it's amazing. Now I enjoy the moment because we haven't got a lot of time to enjoy."
Despite hardly getting a look in under Mauricio Pochettino, Llorente has thanked his manager for having belief in him and says his winner was a gift.
"He's massively important," he said. "He gives you confidence. I think I need it, in this moment, to get confidence and to do my best.
"It's difficult because in all my career I always played. I am a player who feels really good when I play but it's really difficult when you don't play - mentally, everything.
"You have to work a lot and be ready and believe in that moment.
"It was a gift to him, a gift to the supporters and to all the team because we deserved the win. It is very important."
Son's return to the side was a big boost for Spurs, who had looked toothless without him, Kane and Dele Alli in recent weeks.
He spent just under two weeks in the United Arab Emirates with South Korea during their Asian Cup campaign and saw his club side knocked out of both cup competitions in that time.
And Son admits events back in England "hurt" him.
"Of course, when I saw the Fulham game, we scored last minute and of course I was happy but also Dele was injured and it hurt," he said. "When you go away, your team go out of a semi-final the cup game, and the FA Cup, it just hurt. It hurt like you can't even imagine.
"Football is about... in three days or one week you can make it better. That was the main thing.
"I followed it when I was in the Asian Games in Indonesia and I followed it this time as well. I must follow, if I don't follow then I can't sleep!"
