Macena moved to Shandong Luneng in February 2012 after spending seven years in Denmark. He then transferred to Hangzhou Greentown in January 2014, and Gama feels that Macena gleened important information during his time in China.
"Macena used to play for two CSL teams so I consulted him about our opponent Guangzhou R&F and I have also watched all three of Guangzhou’s ACL matches this season," Gama said.
"Their forward Hamedallah is a great player, his ball control is impressive and he is also physically strong. They are going to be a very tough opponent."
Buriram take on Guangzhou at the Yuexiu Stadium on Tuesday. The Thai champions opened their continental campaign with a 2-1 win over Seongnam FC.