Sep.22 (GMM) F1 drivers have in the past asked the governing body to reduce the length of the Singapore Grand Prix.
Hot, humid and under artificial lights on a demanding street circuit, the event is regarded as perhaps the toughest physically on the entire 20-race F1 calendar.
Spanish veteran Pedro de la Rosa confirmed that description, even though this weekend is actually the HRT driver's very first competitive taste of the Marina Bay layout.
De la Rosa said Singapore is like Monaco in terms of "effort and concentration", with the big difference being "humidity and distance".
"Here (the race) is 309 kilometres, Monaco is 260," he explained.