MILWAUKEE -- Giannis Antetokounmpo sat in a daze, with his size-16 right foot planted in a big, blue ice bucket at his locker, as his older brother Thanasis Antetokounmpo rolled his chair to the right side of him to console him in their native language following the Milwaukee Bucks' home-opening loss on Saturday.

It was a tough pill to swallow. Giannis Antetokounmpo became the first reigning MVP to ever foul out of his first game Thursday night at Houston. But that was in a win. He repeated the disqualification act for a second consecutive game Saturday, in addition to the Bucks blowing a 21-point, second-half edge. The Miami Heat, who were playing without veterans Jimmy Butler, Dion Waiters and James Johnson, escaped Fiserv Forum with a 131-126 overtime victory.

"It's not frustrating. First game we won," Antetokounmpo said of the consecutive foul outs. "I think the frustrating part is not being out there to help my team, not necessarily I don't know if we would've won the game but just being out there and try to help your team to maybe block a shot, rebound or maybe make a pass or something.

"That's the frustrating part about it," he continued. "Obviously, I've got to keep learning from it and get better."

Giannis Antetokounmpo reacts to fouling out for the second game in a row to start the NBA season. His Bucks were unable to hold off a Heat rally Saturday night, losing 131-126 in overtime. Dylan Buell/Getty

Milwaukee's 14 made 3-pointers at halftime tied for the most in any half of franchise history. But the momentum shifted in the second half, particularly in the third quarter, as the Bucks went 3-for-24 the rest of the way from beyond the arc -- including 0-for-4 in overtime -- to shoot 31.5%.

Antetokounmpo finished with a near triple-double (29 points, 17 boards and 9 assists), including a buzzer-beating tip-in to end regulation knotted at 121-121 off Khris Middleton's missed jumper. The Bucks even being in position for Antetokounmpo to save the game was precarious, as the Heat led 117-108 with 3 minutes, 33 seconds left, and 120-116 with 9.3 seconds left.