The daughter of Authorized owes us nothing, having already won at Group 1 level when taking the Irish Pretty Polly Stakes at The Curragh in June.
She ran creditably in the Nassau Stakes at Goodwood last time out and has trained well since.
Roger said: "Ambivalent has travelled over well, she is eating and drinking and looks in good shape.
"She has been working nicely and the track and trip should suit."
The Bosphorus Cup, run over 1m4f, is worth 300,000eu in prizemoney. Other international raiders include Group 3 winner David Livingston and Godolphin's Lost In The Moment.
This has been a lucky meeting for the Kremlin House team with Pressing having won the Topkapi Trophy on three occassions.