Renault team boss Cyril Abiteboul has told Max Verstappen to focus on delivering performance from his Red Bull car rather than criticise the Renault engine powering it.
Verstappen has grown increasingly impatient with Renault this year as the French manufacturer has struggled to close the gap to pace setters Ferrari and Mercedes while experiencing continued reliability issues.
The latest 'C-spec' upgrade was delivered to Red Bull at the Italian Grand Prix earlier this month, offering a performance boost over the 'B-spec' still used by Renault and McLaren. However, drivability issues at the last round in Singapore saw Verstappen broadcast a series of frustrated messages over team radio at the night race despite qualifying and finishing second.