Aston Martin driver Fernando Alonso is under investigation for an incident which caused an unusual finish to the Australian Grand Prix.
George Russell's late crash - which saw his Mercedes car end up on its side - meant that the race finished under virtual safety car conditions, with Russell's car spread across the circuit.
The Brit was attempting to challenge Alonso for sixth at the time, and the Spaniard is now being investigated, with Martin Brundle suggesting Mercedes will be claiming that Alonso 'brake tested' Russell.
The incident happened on the penultimate lap of the race, and Russell got onto the gravel while scrambling around behind Alonso, before slamming into the wall to end his and Mercedes' chance of points.
Aston Martin have now climbed above the Brackley-based team into fourth in the constructors' standings, but that may yet be subject to change pending the result of Alonso's investigation.
The Spaniard will argue that he didn't affect Russell's race, but the Brit did seem to catch Alonso a huge amount while heading into turn six, which was why Brundle believed Mercedes have a case that the Aston Martin driver 'brake tested' Russell.
Asked by Sky Sports F1 about reported suggestions from the Mercedes camp that he had brake tested Russell, Alonso replied: "Obviously I was focusing in front of me and not behind.
"I had some issues for the last 15 laps or something on the battery, on the deployment, so definitely I was struggling a little bit at the end of the race but I cannot focus on the car behind.
"But he's ok, apparently. I saw the car and I was very worried."