Force India's Sergio Perez was left frustrated by a miscommunication in the pit lane as he collected 11th position at the Hungarian Grand Prix.
Perez intended to stop only once, switching to the Medium tyres after a 27-lap stint on the Soft compound.
However, Perez had to come in again for fresh Softs and Force India was not prepared for his presence, costing the Mexican valuable time in the process.
"It was a tough race today," he said.
"We were planning to do a one-stop race, but the performance was not there on the medium tyres and the car was sliding around under me.
"So we decided to switch to the two-stop, the team called me in, but when I arrived in the pit lane the team was not expecting me.
"I think it was a simple miscommunication between the pit wall and the mechanics, which can happen sometimes. It’s frustrating because it cost me some time and the chance to be in the points."