Hearts of Oak head coach Nebojsa Kapor is vowing a “serious performance” against Bibiani GoldStars in their matchday fixture of the Ghana Premier League.The Phobians are eyeing back-to-back victories after a comprehensive win in their opener against Berekum Chelsea.However, GoldStars have proven to be a bogey side, having been undefeated at Duns Park in their last four meetings against the Phobians.“The game [against GoldStars], is different,” Nebojsa said.“We are trying to get the high standard in the league.“[There] is a lot of pressure on the players. I am sure that there will be a serious performance because every away match in Ghana is a very difficult match.Meanwhile, GoldStars suffered a 1-0 defeat in their opener against Bechem United.