LeBron James was frustrated with the performance and the officials as the Los Angeles Lakers suffered a fourth-quarter collapse against the Golden State Warriors.
Defending NBA champions the Lakers went into Monday's home game on a run of five straight wins.
They raced into an early 19-point lead and still led by 14 in the fourth quarter but fell to a surprise 115-113 loss.
The game marked the 284th time in his career James and his team took a double-digit lead into the fourth quarter at home in the regular season and postseason. Per Stats Perform data, it was the first of those in which LeBron's team lost the game in regulation.
It was not what the Lakers needed before starting a seven-game road trip on Thursday against the Milwaukee Bucks.
"I think we just had some tough breaks, some tough calls against us in the second half that slowed our pace down," said James, who finished with 19 points, five rebounds and five assists.
"We couldn't get back into a rhythm.
"Obviously you are frustrated any time you lose, especially when you know you could have played better. We know we can play much better. We can all learn from that and apply it to next game."
James was not happy about being called for travelling, adding: "It is so funny because the very next play Draymond [Green] gets into the lane and slides his foot and it is not called.
"The same official who called me for the travel is right there on the play and told me he didn't travel."
Anthony Davis had 17 points, 17 rebounds and seven assists, while Dennis Schroder topped the team with 25 points, but they fell to 11-4 overall and 4-4 at home this season.
Lakers coach Frank Vogel added: "We got outplayed in the second half. We got hesitant on the offensive end, and a little casual at certain points in the game."
Stephen Curry scored 26 points to inspire another Warriors comeback, as the team improved to 7-6.
Earlier in January the Warriors beat the Lakers' city rivals, the Los Angeles Clippers, despite being 22 behind in the third quarter.
"We kept our composure and the second unit was amazing both halves," Curry said.
"We got some momentum in the second half to give us a chance and carry us down the stretch. It was similar to the Clippers game. We've done it twice now but want to get leads early."
The Warriors play at home against the San Antonio Spurs on Wednesday.
They had lost their past two games against the Denver Nuggets and Indiana Pacers despite a combined 55 points from Curry.
The two-time MVP is averaging 28.2 points per game, on pace for the second-best scoring season of his NBA career.