Australian Grand Prix 2013: Red Bull showing ominous form as Sebastian Vettel tops practice timesheets What to watch out for Red Bull already look as if they have a significant advantage, with Sebastian Vettel and Mark Webber setting the two fastest times in free practice. Kimi Raikkonen and Romain Grosjean both looked to be on the pace for Lotus, while Lewis Hamilton's Mercedes was carrying over the pace it had shown in the final test. Both Fernando Alonso and Felipe Massa should also feature strongly for Ferrari with the improvements to their 2013 car. Where the race will be won and lost It will absolutely be decided by the way the teams use the tyres. Even if drivers qualify out of position here, they can make up one or two seconds in lap time around Melbourne's street circuit just by exploiting the sweet spot on the tyres. For all the teams, still unsure how much of a margin they have on their rivals, it is a journey of discovery in Australia. Major talking point McLaren are making a very low-key entrance this season. Their 2013 car, the MP4-28, was 2.3 seconds adrift in the second practice session here, although nobody could tell for certain what level of fuel-load they were using. Williams are also fairly quiet, with neither Pastor Maldonado nor Valtteri Bottas making much of an impression in their times. Three key areas of the circuit The first two sectors of the Albert Park circuit are all about braking, so if you are on the right tyres you can gain some serious lap time. The third sector is all about the front end - your tyres are beginning to open up and maybe starting to grain slightly, so the guy who keeps his front tyre alive heading into the final three or four corners will be the one who wins this race. DRS zones Melbourne will again feature two DRS zones in 2013, with the FIA retaining the same detection and activation points as last season. If drivers are within one second of the car ahead just before turn 14, they will be able to employ DRS along the pit straight and between turns three and four. TV Qualifying 6am Saturday, live on Sky Sports F1, highlights on BBC1. Race 6am Sunday, live on SSF1, highlights on BBC1. Weather forecast: Cool, 16C (61F), with a 40 per cent chance of rain.