Jenson Button refused to comment on Thursday about his future in Formula One amid reports he would retire at the end of 2015, as preparations continue for Sunday's Japanese Grand Prix at the Suzuka circuit.

Button, the 2009 world drivers champion, spoke about his disillusionment with the performance of his McLaren Honda after the recent Singapore Grand Prix, where both he and teammate Fernando Alonso failed to finish due to mechanical problems.

After hinting he would make an announcement in Suzuka, Mie Prefecture, Button was tight-lipped about his future at a Thursday press conference.