Form: Victories over Japan, the United States and Canada in the Pacific Nations Cup this summer will have given Tonga confidence ahead of the World Cup but defeats to Fiji, as well as Scotland in November last year, suggest they are still outsiders to reach the knockout stages.
Captain: Nili Latu made his Test debut in 2006 and the back-row forward has since established a reputation as one of the toughest tacklers in the game. Now 33, this will likely be Latu's last World Cup and he will eager to go out with a bang.
Star player: Fetu'u Vanikolo is no newcomer to international rugby, having made 21 Test matches for Tonga, but he has scored an impressive 16 tries in that time including one against Japan at the World Cup four years ago.
World Cup history: Tonga have never made it past the pool stage at a World Cup although a 19-14 win over France in 2011 put them in contention, before defeat to Canada ended the Islanders' hopes of progress. Tonga have improved in each of their six tournaments but they will likely have to overcome Argentina if they are to make the quarter-finals this time around.
Tonga’s Pool C fixtures:
Sat 19 Sept TONGA v GEORGIA (Kingsholm, 12pm)
Tues 29 Sept TONGA v NAMIBIA (Sandy Park, 4.45pm)
Sun 4 Oct ARGENTINA v TONGA (Leicester City Stadium, 2.30pm)
Fri 9 Oct NEW ZEALAND v TONGA (St James Park, 8pm)