German star could face consequences

Mercedes threatened to review its policy of allowing its drivers to race each other freely after Formula One leader Nico Rosberg and Lewis Hamilton collided at the Belgian Grand Prix on Sunday.

"Unfortunately, yes," Mercedes motorsport head Toto Wolff said when asked whether the dominant team might change its tactics.

"It would be too early to elaborate in detail because the devil lies in the detail. We are all fans and we owe it to ourselves and everybody out there to let them race," he said.