The trial against an 86-year-old Swiss and a 66-year-old French on fraud charges, maladministration, breach of trust and forgery of securities began on June 8.
The top football officials were on trial for a two million Swiss franc ($2.08 million) payment which Platini received back in 2011, when he was the head of UEFA.
Blatter argued that FIFA owed Platini the sum, since the latter was serving as a presidential adviser in Blatter's first term between 1998 and 2002. The former French national team star has claimed the allegations against him emerged in September 2015 as a part of campaign, aiming to block him from seeking the office of FIFA president.