Paris - Argentinian international Juan Imhoff was slapped with a five-week ban on Wednesday for headbutting Castres scrumhalf Rory Kockott during Racing 92's 29-7 European Champions Cup win at the weekend.

The 29-year-old was sent off in the 75th minute of Saturday's all-French clash for headbutting Kockott, after the France halfback had been yellow-carded himself for a dangerous tackle on Imhoff's team-mate Maxime Machenaud.

Imhoff, who has scored 21 international tries as a winger or fullback, will be out of French Top 14 and Champions Cup action until January 22.