Holtby has rapidly risen to success at Schalke and has since been capped by Germany, despite having an English father who wants him to play in the Premier League.
“We are in intensive talks with Lewis (Holtby),” Heldt told Deutsche Presseagentur.
“I would be glad to see him decide in our favour then.
“Still it is very important for him to take his time and look into options at other clubs.
“It’s the only way for him to find out that Schalke 04 is the right choice for him as a player.”