Six more current or former tennis players linked to a match-fixing syndicate in Belgium were given suspensions of varying lengths — one was barred for 15 years — and fined, the International Tennis Integrity Agency said Friday. The player who received the longest ban in Friday’s announcement, 34-year-old Agustin Moyano of Argentina, was suspended for 15 years and fined $10,000 after denying the charges and requesting a full hearing.