Tetsuya Naito has been forced to withdraw from the ongoing G1 Climax 31 tournament. New Japan Pro Wrestling released a statement regarding Naito's injury, stating that the former IWGP Heavyweight Champion suffered an injury to his left knee.It claimed that the damage was incurred to Naito's left meniscus and MCL. Due to this, the leader of Los Ingobernables de Japon will be unable to compete in the remainder of the G1 Climax tour.NJPW has also confirmed that, as of right now, there is no timetable for Tetsuya Naito's return to in-ring action. All of his remaining matches will be counted as losses via forfeit with his scheduled opponents getting an automatic two points.NJPW Global@njpwglobalTetsuya Naito suffers left knee injury, to withdraw from G1 Climax 31 competition. njpw1972.com/104513#njpw #G13111:00 AM · Sep 21, 2021554151Tetsuya Naito suffers left knee injury, to withdraw from G1 Climax 31 competition. njpw1972.com/104513#njpw #G131 https://t.co/O8gSbkGhyMIt is also to be noted that Tetsuya Naito's remaining opponents will instead be competing in special singles matches. The company has updated the match cards with the likes of Yuji Nagata, Satoshi Kojima, and Naito's fellow stablemates BUSHI and Hiromu Takahashi taking his spot across several match cards.Here is the updated schedule from NJPW:September 23: G1 Climax 31 Night 3, Ota-ku1st Match: Yuji Nagata vs. Tanga LoaSeptember 26: G1 Climax 31 Night 5, Kobe2nd Match: Yuji Nagata vs. Shingo TakagiSeptember 30: G1 Climax 31 Night 7, Korakuen Hall1st Match: BUSHI vs. Yujiro TakahashiOctober 3: G1 Climax 31 Night 9, Nagoya2nd Match: BUSHI vs. Toru YanoOctober 7: G1 Climax 31 Night 11, Hiroshima2nd Match: Hiromu Takahashi vs. KENTAOctober 9: G1 Climax 31 Night 13, Osaka2nd Match: Hiromu Takahashi vs. Tomohiro IshiiOctober 13: G1 Climax 31 Night 15, Sendai2nd Match: Satoshi Kojima vs. Kota IbushiOctober 18: G1 Climax Night 17, YokohamaSatoshi Kojima vs. Great-O-KhanTetsuya Naito is a multiple time IWGP Heavyweight ChampionTetsuya Naito is a three-time IWGP Heavyweight Champion. The leader of Los Ingobernables de Japon is also a former dual champion, having held both the IWGP Heavyweight and Intercontinental Championships at the same time.内藤哲也 naito tetsuya@s_d_naito[LOS INGOBERNABLES de JAPON]“G1 CLIMAX” comenzará mañana en ŌSAKA.4:49 AM · Sep 17, 20214151835[LOS INGOBERNABLES de JAPON]“G1 CLIMAX” comenzará mañana en ŌSAKA. https://t.co/hGQt6qRMgiHe also very recently won the IWGP Tag Team Championships with SANADA but the LIJ duo ended up dropping their belts to Dangerous Tekkers after only two weeks.