AP

RIO DE JANEIRO (AP) — Arjen Robben reacted angrily to a tough challenge from Netherlands teammate Bruno Martins Indi during a World Cup training session at their base in Rio.

Robben kicked out at Martins Indi after one tackle and lay on the ground clutching his back after another strong challenge by the Feyenoord defender on Sunday.

The Bayern Munich winger briefly left the pitch but later returned and did not appear hurt.

Martins Indi admitted afterward that the pair had clashed. Robben did not speak to the media.

"Arjen is a good dribbler. I thought he fell needlessly once," Martins Indi said. "We had a little head-to-head."

A reporter said to Martins Indi that he thought he had seen irritation between the two, to which Martins Indi replied, "You saw right."