Great Britain's Jenson Button believes that the number of laps in the Singapore Grand Prix should be decreased.
The Marina Bay Circuit currently requires drivers to complete 61 laps to finish the race.
McLaren's Button has claimed that the length is "demanding" on the drivers and compared it to the Monte Carlo track.
"Mentally it's very tiring because it's low speed, like Monaco in a way with the barriers so close to the circuit, very bumpy, dark, so it's very demanding for the drivers," said the 31-year-old.
Button's best finish at the Singapore GP is fourth.
