LUBANGO - Substitute Achille Webo set up two goals, as Cameroon snatched a 2-2 draw against Tunisia to scrape into the African Cup of Nations' quarter-finals on Thursday. Zambia also progressed after beating Gabon 2-1. Webo, who came on as a second-half replacement for Jean Makoun, provided Samuel Eto'o and Landry Nguemo with perfect back passes as Cameroon twice fought back to advance from Group D. Tunisia, eliminated after drawing their three games, had gone ahead in the first minute through Amine Chermiti and again in the 63rd when defender Aurelien Chedjou netted into his own goal.