Authentic dominates Breeders’

Authentic won the Breeders’ Cup Classic, going wire-to-wire for a 2¼-length victory over Improbable that gave trainer Bob Baffert a 1-2 finish Saturday at Keeneland.

The Kentucky Derby champion and Preakness runner-up broke out of the gate quickly and set the pace for others to follow. Stablemate Maximum Security pursued for a while before Global Security overtook him and then was passed by Improbable entering the stretch. Authentic, at 9-2, never let up with John Velazquez aboard and extended his lead by the end.

Authentic’s winning time in the $6 million race over 1¼ miles wasn’t immediately available because of a technical glitch.

Even-money favorite Monomoy Girl blew by the leaders around the final turn and held off a challenge by 14-1 shot Valiance to win the 1⁄ -mile Distaff 8 for the top fillies and mares 3 years old and up.

Monomoy Girl’s second Cup win in three years followed a big upset in the Mile by Order of Australia.

The 73-1 longshot, in the race following a scratch and with a substitute rider aboard, won the $2 million race by a neck over Circus Maximus.

Earlier, Boudot rode Audarya to a track-record 1:52.72 over 1 3/16 miles to win the $1 million Filly & Mare Turf by a neck over Rushing Fall.

British-bred filly Glass Slippers earned a half-length victory Wet Your Whistle in the 51⁄ 2- furlong Turf Sprint. The 4-year-old filly’s time of 1:01.53 was just off the track record of 1:00.86.

Baffert-trained filly Gamine opened the nine-race slate of stakes races with a dominant, record-setting trip in the Filly and Mare Sprint.

Knicks Go also broke a track record, winning the Dirt Mile by 3½ lengths over Jesus’ Team and running 1:33.85.