DEFENDING champion Rickard Rydell of Sweden has been given the green light to compete in this month's 40th Macau Grand Prix - two months after suffering a punctured lung. Rydell is one of the most consistent drivers in the history of the Guia circuit and has recently been given a clean bill of health from doctors after puncturing his lung while playing squash in September. He spent two weeks in hospital, forcing him to miss several races in the Japanese national championships. Rydell has recently returned to action, racing twice and finishing the season second overall in the Japanese series. The young Swede is looking forward to his seventh race in Macau in one of four Toms Toyotas competing on the circuit. The Macau Grand Prix, scheduled for the weekend of November 20 and 21, will see the world's best Formula Three drivers competing in what has become internationally known as the ''World Cup'' of Formula Three racing. Hotly tipped to win the race is current British Formula Three champion Kelvin Burt, who will be competing in a Paul Stewart Racing Dallara 393 Honda. Burt will be partnered by German Formula Three driver, Saascha Maassen, who finished third in his national series.