Boss Sergej Jakirovic has cast doubt over whether Hull City will return with a second offer for Swansea City striker Zan Vipotnik. News emerged on Monday that Hull, who won promotion to the Premier League last season, had seen a bid for Vipotnik rejected by Swansea. Vipotnik netted 25 Swansea goals last season – including 23 in the league – and scored three times for his country. Jakirovic was asked during an appearance on BBC Radio Humberside on Tuesday whether Hull had made an offer for Vipotnik. When asked whether the Tigers would make a second bid for a player he previously worked with at Maribor, Jakirovic added: "I don't know.