The Australian driver has been out-qualified by his teammate Yuki Tsunoda at every race this season, with Tsunoda only two points behind Lewis Hamilton in the drivers’ standings.
According to Mundo Deportivo he said: "Each driver sees the other's data and they have the same car. Daniel has shown in the past that he is a fast driver, so it is something mental. He has a mental problem.”
In addition to this, Marko has expressed confusion over Ricciardo’s current form.
“We’re all puzzled over that,” Marko said to Laola1. “He is generally slower than Yuki. Something never fits with him, which is surprising, because things looked very good for him in winter testing. But Yuki is clearly the faster one at the moment.
“The question is: Has Yuki become a high-flyer or is Daniel so weak? There is no objective answer after three races on three completely different circuits.”