The Australian found himself on the receiving end of a pointed remark from Red Bull's motorsport advisor after a disappointing showing in the Saudi Arabian GP, where he was outqualified once again by team-mate Yuki Tsunoda.
Writing in his column for Speedweek about the performance of RB's two drivers, Marko said: "There is a lot at stake this season for both Yuki and Daniel. Yuki's qualifying was very good, and Ricciardo will have to come up with something soon."
