Such notable achievements in the 2006/2007 European Challenge Cup include a hat-trick of tries against French side Bayonne.

Fercu helped guide Romania to the 2007 Rugby World Cup as he played in the qualifier matches including the vital games against Georgia and Spain and scored a try against Spain in the game that sealed their qualification to the Rugby World Cup.

Fercu was a late withdrawal from their Rugby World Cup squad because he was not prepared to fly all the way to New Zealand.

The Romanian side arrived in Christchurch to prepare for their first game of the tournament against Scotland in Invercargill on 10 September without Fercu, who failed to get on the plane when it left Romania.

On 28 March 2015, he made his debut in the Aviva Premiership against Harlequins 42-14 at the Wembley Stadium in London, England, in front of a world record breaking assistance of 84,068.