The four local teams with chances to grab at-large tournament bids all confront different challenges with less than two weeks until selection Sunday. There’s George Mason, with its 15-game winning streak, trying to maintain a likely single-digit seed despite not playing in a power conference. There’s Maryland, which has not suffered a bad loss all season, running out of opportunities for a signature win. There’s Georgetown, which is hoping Chris Wright returns for an NCAA tournament, still in line for a top-four seed. And there’s Virginia Tech, whose fans may still be celebrating the team’s upset over Duke – a win that significantly bolsters the Hokies’ tourney hopes. George Mason Record: 25-5 RPI: 24 SOS: 84 (78 in non-conference) Vs. top 50: 2-1 Vs. top 100: 8-3 Best wins: Old Dominion (27), Harvard (44) Worst losses: vs. Wofford (125), vs. N.C. State (101) Road-neutral court: 11-5 As of today: No.

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NCAA tournament 2011: Virginia Tech earns signature victory