A pair of guest referees from Thailand is set to officiate the Philippine Superliga (PSL) Grand Prix best-of-three finals series between Petron and F2 Logistics starting on Tuesday at the Filoil Flying V Centre in San Juan.

International referees Komsun Gettaworn and Jirasak Pumduang will arrive tomorrow (Monday) to make sure that the officiating would be accurate and objective to both the Blaze Spikers and the Cargo Movers, who will be figuring in the titular showdown for sixth straight time.