LAS VEGAS : Japanese Formula One driver Yuki Tsunoda said he was interrogated in his pyjamas for several hours by U.S. border control officials before being let into the country for Saturday's Las Vegas Grand Prix. The racer for Red Bull-owned RB told reporters on Wednesday he had no issues on his two previous visits this year for races in Austin and Miami. "Luckily, they let me in after a couple of discussions," he said. "Well, a lot of discussions, actually ... I nearly got sent back home."