By Steve Keating RIO DE JANEIRO (Reuters) - Rio visitors have been warned of the risk of muggings during the Olympics but Senegal still could not avoid a brutal beat down as the U.S. women's basketball team began their bid for a sixth consecutive gold with a 121-56 rout on Sunday. The result was as predictable as a tourist walking into one of the city's notorious favelas flashing a fistful of hundred dollar bills with Senegal searching for their first Olympic win going up against the all-conquering U.S., a true Olympic dynasty riding a 41-Games unbeaten run. The 65-point margin of victory was the biggest ever in women's competition at an Olympics, bettering a 60-point win by the U.S. over Zaire at the 1996 Atlanta Olympics.
