Horse of the Year Rachel Alexandra turned in her most serious work in advance of her season debut, covering six furlongs in 1:13 3/5 at the Fair Grounds Tuesday morning.

With regular exercise rider Dom Terry up, the daughter of Medaglia d'Oro hit the half in :51 flat before turning it on to go the final quarter in :22 3/5. The filly worked in company - unusual for her - with Asmussen-trained stablemate Depaul, who finished up in 1:14 4/5 with Rachel Alexandra pulling away down the stretch.

Rachel Alexandra is on track to make her season debut - and her first start since winning the Woodward Sept. 5 - in the March 13 New Orleans Ladies Stakes at the Fair Grounds.

The 4-year-old filly will have a maintenance move next Monday, six days before the race.