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FORMULA One world champ Lewis Hamilton knows he must get some additional pace for Saturday's Singapore Grand Prix qualifying following a slow practice. The Briton published seventh and ninth in both periods and although no specific problems were suffered by him on the floodlit road signal, says he should increase somehow. 'I am still missing some rate in a few places, and so I need certainly to focus on that,' the driver said. 'The (exercise) periods were only a little up and down for me... I didn't have any significant issues, but I was not as quickly as I'd expected to be. 'When the monitor gets a little cleaner... we'll have a much better knowledge of the tyres. The most important thing for all of us would be to evaluate the information, decide to try and enhance the car and find even more time.' -- REUTERS