According to Cleveland.com's Chris Haynes, Love said a teammate slapped him on the arm when he went out on the court.
Love is expected to be sidelined four to six months after undergoing surgery to repair his dislocated left shoulder.
"I walk out there, the teammate will remain nameless, I go up and give him a big hug [and I said] 'congratulations' and he takes his arm and he goes, 'Ah yeah man, good game' and just hits me right on the arm," Love playfully explained. "Some of the front office staff who was out there with me kind of had to grab me and said, 'Are you OK?'"
"It was one of those deals where it was kind of shooting pain through my entire body, but I was a little woozy and kind of all over the place for a few minutes but I was able to calm myself down," Love said.
Game 1 of the NBA Finals between Cleveland and the Golden State Warriors will tip off on Thursday at 9 p.m. ET.