NEW YORK (Reuters) -Naomi Osaka came to Flushing Meadows to entertain and did not disappoint on Monday, overcoming a slow start to beat Czech Marie Bouzkova 6-4 6-1 and get her U.S. Open title defence under way in front of a roaring capacity crowd.

Unseeded Bouzkova held her own through much of the first set but failed to convert on four break point opportunities against the Japanese four-time Grand Slam winner.