The fourth seeds lost to Marcel Granollers and Horacio Zeballos in their opening match but responded well against Gonzalez and Molteni, firing eight aces and winning 94 per cent (30/32) of their first-serve points to triumph after 77 minutes.Gonzalez and Roger-Vasselin joined forces for the first time at the start of this season and enjoyed a standout year. The Mexican-French team won five tour-level trophies, including ATP Masters 1000 crowns in Miami and Paris.Gonzalez, 40, is the first Mexican to qualify for the year-end event since Jorge Lozano in 1989, while Roger-Vasselin, 39, is appearing at the Nitto ATP Finals for the third time. Gonzalez and Roger-Vasselin will play Ivan Dodig and Austin Krajicek in their final round-robin match on Thursday.Gonzalez and Molteni are now 0-2 in Green Group. The Argentines won five title this season, highlighted by their Masters 1000 triumph in Cincinnati.–IANShs/cs(Disclaimer: This post has been auto published from IANS news agency without any modification to the text and has not been reviewed by editor)