In securing the victory he became the all-time Ryder Cup leading points scorer with 25 and a half points, eclipsing Sir Nick Faldo's record.
"I don't usually cry but today I couldn't help it. What a week," said Garcia after Europe secured the Ryder Cup.
"It has been a rough year but we fought hard and I'm so thankful for Thomas for picking me and believing in me. I am so happy to get the cup back."
On his record the Spaniard added: "It means a lot but at the end of the day it's about the team and I was happy I was able to help with some of the points I won.
"It's a bonus, something I never thought I'd have the possibility of doing it but these guys are unbelievable.
"A lot of people thought the Ryder Cup was over before it was played. I guess unfortunately they picked the wrong team."
Fellow Spaniard Jon Rahm was equally emotional after beating Tiger Woods.
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Rahm's win meant Woods failed to register a point from four matches this week and left Europe needing just two more points for victory.
"There is a lot going on for me right now - the memory of Seve (Ballesteros) and my grandpa, who would have loved to be here, who passed away at the USPGA," said Rahm.
"To beat Tiger, one of the all time greats, if not the greatest, on the Sunday, at a pivotal point, it is the best feeling of my life.
"Apart from what happened (missing a short putt at 16), I was one up going down 17. All the pressure was on Tiger. It was a really good redemption feeling to make that putt after 16."