Havertz’s 42nd minute strike — his first goal for the club in the Champions League — gave Chelsea their second European crown nine years after they beat Bayern Munich to win their first.
“I don’t know what to say, I waited a long time. I’ve worked 15 years for this moment, I am overwhelmed,” 21-year-old Havertz told BT Sport.
Chelsea captain Cesar Azpilicueta hailed the young forward.
“Havertz’s mentality is top, this guy will be a superstar, he ran like crazy, this is why he deserves this.
“I came here in 2012 after that Champions League win. I wanted to repeat that Champions League success. It is amazing. My family are here. It is a special, special day.”
French midfielder N’Golo Kante, who was voted the man of the match for his tireless performance for Chelsea, said he felt “joy and pride”.
“It’s amazing, it’s the result of a lot of efforts and difficulties during the season but in the end it is the work of a whole group,” Kante told French broadcaster RMC Sport.
“Today we suffered, we battled until the end and we were rewarded with the victory.”
He credited the arrival of Thomas Tuchel to replace the sacked Frank Lampard in January for the European triumph, which came after Chelsea scraped to a fourth-place finish in the Premier League and lost the FA Cup final to Leicester.
“It was the arrival of a new coach, a change of tactics and lots of effort,” he said.