Lionel Messi scored his first two goals after a two-month injury layoff and Luis Suarez netted a brace in a 6-1 rout of Roma on Tuesday as Barcelona advanced to the Champions League knockout rounds for a 12th consecutive season.Suarez got Barcelona rolling at Camp Nou in the 15th minute. Three minutes later Messi scored his first goal in his second appearance since returning from a left-knee injury.Messi netted the hosts' fifth after Suarez and Gerard Pique scored. Adriano capped the demolition before Edin Dzeko got Roma's consolation.Barcelona had already qualified for the next phase before kickoff after Bayer Leverkusen was held 1-1 at BATE Borisov, but the victory secured the defending champions the top spot in Group E with a game to spare.