LONDON, England - Lotus approached Michael Schumacher about a possible Formula 1 comeback for the last two races of the season but the retired seven-times champion made it clear he was not interested.German Formula 1 driver Nico Hulkenberg has also turned down an offer from Lotus to replace the surgery-bound Kimi Raikkonen for the remaining two grands prix of 2013.'STILL FIT, STILL GOOD'Schumacher's spokesperson Sabine Kehm said the approach to the 44-year-old, who quit the sport in 2012 after a three-year comeback with Mercedes following his earlier retirement from Ferrari, came as no surprise.She told Reuters in an email on Wednesday: "Michael's performance against Nico (Rosberg in 2012) and Nico's performance against Lewis (Hamilton in 2013) made a lot of people aware of how good Michael still was. Plus, he is still very fit, but he just feels so good in his new life."Lotus has been seeking a replacement for 2007 champion Kimi Raikkonen, who is leaving for Ferrari at the end of the 2013 season, has pulled out of the US and Brazilian GP's to have back surgery.The team is now expected to agree a deal with former Renault, McLaren and Caterham driver Heikki Kovalainen for the 2013 US GP in Austin, Texas on Sunday November 17. Stay with Wheels24 for the 2013 US GP weekend.