New Delhi: Narain Karthikeyan on Tuesday agreed to race for A1 Team India at Taupo, New Zealand in the A1GP World Cup of Motorsport event this weekend. "I'm very proud to drive for my country in A1GP. I've been following the team's fortunes since the start of the Series," said Karthikeyan who has signed up as test driver for Williams F1 in Formula One this season. Karethikeyan, however, made it clear that F1 would remain his top priority. India's first F1 driver will replace Armaan Ebrahim behind the wheels. "Frank Williams has kindly agreed for me to race. My Formula 1 testing duties for Williams will always be my number 1 priority. I am very thankful for Sir Frank's support," he said. "I am very privileged to be in Formula One, but like all drivers I want to race fast cars as well as drive them. "In the recent months, I have had several offers to drive in America and Japan, but I chose A1GP because the race schedule does not clash with my Formula 1 commitments and it also offers a good financial package for myself."