On Saturday, Daniil Kvyat was officially announced as Pierre Gasly’s replacement at Toro Rosso, leaving the seat currently occupied by Brendon Hartley yet to be confirmed.
Wehrlein has ensured that he is a possible option for Toro Rosso by cutting his ties with Mercedes and making himself a free agent.
He is understood to have met Marko in Graz last week.
Marko admitted that Wehrlein’s availability had made him a candidate.
“It’s a different story now, yes,” he told Motorsport.com. “We haven’t made any decision. He’s on a long list.”
Red Bull boss Christian Horner has downplayed the possibility, however, suggesting that the German is already committed elsewhere.
“My understanding is he’s off to do Formula E next year,” he told Motorsport.com.
Asked if that might change if Wehrlein had an F1 offer, Horner said: “That’s a discussion that we’ll have internally.
“There are numerous options available. I think we’ve got plenty of time. I don’t think we need to be in a rush.”
Marko suggested that Esteban Ocon would be of interest if, like Wehrlein, he was a free of his Mercedes ties – something that Toto Wolff has made clear won’t happen.
“If he’s free from all contracts, we could discuss it,” he told Sky F1. “I mean, all contracts. We have a seat, Mercedes doesn’t have a seat.”
Asked what Hartley had to do to keep his seat ,he said: “Beat Gasly. There’s five races or six left.”
Marko insisted that Mick Schumacher was not a possible candidate, despite his recent run of success in Euro F3.
“No, definitely not,” said the Austrian. “I think it’s too early for him. Let’s see what happens in F2”