Doyle, 22, gained by some way his biggest success when giving the five- year-old a perfect tactical ride to beat Bahri in the Sussex Stakes at Goodwood last month, the first time he had ridden Sayyedati in a race.
But on Sunday some observers felt the jockey had committed the mare too soon in the pounds 119,000 mile feature, in which she went down by a length to Miss Satamixa.
Brittain himself acknowledged that the pair had been in front earlier than ideal. But the trainer said yesterday: "I must say that I don't blame the jockey in any way for her defeat. The other horses were beaten and weren't going anywhere and she has taken him to the front on the bridle 100 yards too soon.
"But you can't hang around on the bridle forever. If he'd waited and been interfered with, I would have been angry.
Sayyedati is now due for a return to France for Longchamp's Prix du Moulin before continuing her fruitful career in the Breeders' Cup Mile at Belmont Park and perhaps racing on next year at the age of six.
"The Breeders' Cup is the one I am really looking forward to," Brittain said. "New York will give us a home climate advantage - almost."
"I think there is another Group One in her. She's a trainer's dream. It's lovely to see her first thing in the morning and I also sneak a peek at her last thing at night."