Liam Lawson will fill a key role for both Red Bull teams as his wait for a Formula One seat continues. 

He recorded a best placing of ninth, filling in at Alpha Tauri for five races in his debut year. 

Director of both Red Bull Racing and Alpha Tauri, Helmut Marko, told Mike Hosking that the 21-year-old still has room for growth. 

Marko says Lawson will need to be patient in pursuit of a fulltime drive, with incumbents contracted until the end of next year. 

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