Former Swansea City forward Andy Robinson described Hull City's bid of approximately 10m for striker Zan Vipotnik as "pathetic".The Swans rejected the Tigers' bid for the Slovenia international - who was the Championship's top scorer with 23 goals last term.BBC Sport Wales pundit Robinson believes Vipotnik is worth at least double the sum offered by Sergej Jakirovi's outfit."Hopefully we can keep Vipotnik because his goals, it's quite phenomenal. He scored 25 goals (in all competitions) last year," Robinson told BBC Radio Wales Sport."10m for the player who finished as top scorer in the Championship is pathetic. It's absolutely pathetic to even start discussing that."I think the valuation will be around 20m to 25m."Swansea come from behind to win at StokeThree clubs, six derbies as Welsh rivals collideSwansea's Burgess looks set to miss entire seasonVipotnik started his side's 2-1 win at Stoke City on Saturday and claimed an assist for Joseph Opoku's 22nd-minute equaliser at bet365 Stadium.He was replaced in the 65th minute by match-winner Adam Idah, who netted with his first touch after coming off the bench to clinch all three points for Vitor Matos' men.Regardless of whether or not Vipotnik remains at the club beyond the summer transfer deadline, Robinson believes Swansea are in a strong position."For Swansea City, we're hearing from behind the scenes that it's alright, it's quite rosy in terms of the financial situation," he added."We've got [Melker] Widell who can play in behind as a false nine, [Moussa] Yeo's come in, there are still options there. "[Ross] Stewart who has come in as well, if we can get him punching this season, we've got a player on our hands, we know what he can do at this level of football."They've done business well behind the scenes. "If he (Vipotnik) did decide to go or the board decide to sell him, but for 10m, it's pathetic. At that, he's got to stay at the football club and he's going to keep scoring goals hopefully."Swansea City