Radzak (born 3 August 1987) also known as Aidil Zafuan, is a Malaysian retired professional footballer who last played primarily as a centre-back and is currently working as an assistant coach for Malaysia Super League club Johor Darul Ta'zim.

In his time with Johor Darul Ta'zim, he has won 26 trophies in total and making 211 appearances for the club.

In the 2013 season, Aidil joined the rebranded club Johor Darul Ta'zim along with his twin brother, Zaquan Adha.

On 16 November 2022, He made his 200th appearance with the club in all competitions in a 1–0 away win against Sabah where he joins Safiq Rahim and Farizal Marlias to become the third player to reach this milestone[5] Aidil has represented Malaysia since he was 14 years old.

In 2009, he was selected as the captain for the national under 23 team at the 2009 Southeast Asian Games where Malaysia won their first gold medal after 20 years.

Aidil received his first red card in international duty during the 2010 FIFA World Cup qualifiers second leg against Bahrain.

He returned in 2017 and was part of Malaysia's 2018 AFF Suzuki Cup squad earning 82 international caps during the tournament.

However, Chelsea coach Luiz Felipe Scolari praise the Malaysia XI for giving a good fight against his team.