British number one Johanna Konta could turn to one of Stan Wawrinka's former coaches as she attempts to return to the top 10 in the world rankings.
BBC Sport understands the 27-year-old will work with Dimitri Zavialoff on a trial basis at this week's Kremlin Cup.
The pair practised together at the National Tennis Centre in Roehampton this week, but the relationship appears to be at an early stage.
Konta recently parted company with American Michael Joyce.
That means she is searching for a third new coach in two years.
Konta, who reached a career-high ranking of fourth after her run to the Wimbledon semi-finals last year, has fallen to 45th in the world.