Honda Racing F1 test driver Luca Filippi has left the ART Grand Prix GP2 team with immediate effect, the team confirmed on Tuesday.
The Italian has had a disappointing season with the former champions, scoring just five points so far this year.
It is not clear where he will be racing from now on, but ART have announced they have signed Renault test driver Sakon Yamamoto to drive for them from this weekend's round in Hockenheim.
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