A champion in Formula and Formula E, De Vries joined AlphaTauri after excelling last year in a one-off drive for Williams at Monza, where he finished ninth while deputising for Alex Albon.
Despite being an F1 rookie, De Vries' vast experience as a Mercedes test driver and a winner in other forms of motorsport made him an enticing prospect for AlphaTauri to replace Alpine-bound Pierre Gasly.
But the 28-year-old has so far struggled with the team's underperforming AT04 across the first five grands prix, punctuated by a spate of costly crashes and errors.
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While reports that De Vries's future is already under threat are believed to be wide of the mark, the Dutchman nevertheless has to show improvement to stop the pressure from building.
According to seven-time grand prix winner Montoya, De Vries deserves more time after a tough run of street circuits, some of which De Vries had never raced at.
"It's not easy coming into F1, but I think he just needs a bit more time," Montoya told Autosport.
Source: Autosport