San Marino Challenger page help: Odds Portal lists all upcoming San Marino Challenger tennis matches played in San Marino. "B's" column indicates number of bookmakers offering San Marino Challenger betting odds on a specific tennis match. Columns 1, X and 2 serve for average/biggest San Marino Challenger betting odds offered on home team to win, draw and away team to win the San Marino Challenger match. The top line of upcoming matches table (Tennis - San Marino - San Marino Challenger) lets you click-through to higher categories of Odds Portal betting odds comparison service.