SAN DIEGO -- Arizona opened the NCAA tournament with a victory, exactly what a No. 1 seed is supposed to do.

Top-seeded Arizona pulled out a 69-59 win over Weber State in the West Regional on Friday.

"We are fortunate to advance and I know the next game will be a terrific game," Arizona coach Sean Miller said. "One of my hopes is, (having) one of these under our belts, we will be more ourselves and better on Sunday."

The first full day of the NCAA tournament was a wild one filled with upsets, and the bracket-busting trend continued early Friday, when Mercer, a No. 14 seed, knocked off mighty Duke.

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