Marco Melandri's already slim hopes of challenging for the 2014 World Superbike Championship title are arguably over after his elimination from the second race at the hands of team-mate Sylvain Guintoli cast him 92 points adrift of the top.

Already on the back foot relative to his rivals after a difficult start to his tenure at Aprilia, two wins and two podiums in the last four races had sparked Melandri's hopes of a late charge towards the top spot.

However, a fourth place finish and a DNF in the two races at Portimao - the latter after being taken down by team-mate Guintoli - puts Melandri almost 'four races' adrift of Tom Sykes at the head of the standings.

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Indeed, the Italian was particularly disappointed about failing to finish race two having felt quick enough to score a much-needed win.

"It is really a shame," he said. "After almost making it onto the podium in race one I had the right pace to redeem myself in race two. Unfortunately it went as badly as it could and I'm sorry about that because I could have had a really good comeback.

"It was definitely a lost opportunity, but it is also confirmation of the fact that my team and I are continuing to work together with our sights set on the highest prize. We'll have a chance to redeem ourselves in the coming rounds."

Guintoli later apologised for the accident involving himself and Melandri.