Steve Kerr insisted the Golden State Warriors' defeat to the Milwaukee Bucks is not a cause for concern as it is normal for sides to go through difficult spells.

The Warriors were beaten 118-99 by a Giannis Antetokounmpo-inspired Bucks on Thursday to make it four defeats in their past five games.

Despite losing to the Dallas Mavericks, the New Orleans Pelicans, the Memphis Grizzlies and the Bucks, Kerr's side are second in the Western Conference with a 30-11 record.

Without the injured Draymond Green once again, the Warriors showed some fight in the second half to reduce a 39-point deficit to 18, but that was as close as they got to the Bucks.

"I know we just got our butts kicked, but we're just in a rough patch in our season," Kerr said at his media conference. 

"It happens to every team, every year pretty much with very few exceptions. 

"We're in a little bit of a rut and we were playing a team that was ready and played a great first half. We're a little out of sorts. We've just got to get back on track, and we will."