LONDON : Formula One champions McLaren remain the team to beat with Ferrari looking like their closest rivals and Williams much improved, the read-out from pre-season testing in Bahrain suggests. Mercedes, with 18-year-old Italian rookie Andrea Kimi Antonelli joining George Russell after seven-times champion Lewis Hamilton moved to Ferrari, may have made a step forward. Red Bull, dominant in 2023 but third last season, were harder to judge but have work to do before the first race in Melbourne