Rusedski says opponents should serve first against Alex Eala to apply pressure immediately.
Eala and Liutova claimed first WTA titles and climbed the rankings in a week of breakthroughs.
Raducanu will miss the US Open as her stress fracture recovery continues and ranking pressure builds.
Eala beat Pegula in Washington to win her biggest title and rise to a career-high 20th.
Eala fought back to beat Pegula in Washington and claimed her first WTA title on Monday.
Medvedev enters Canada as the fourth seed and discusses the high-profile withdrawals.
Eala won her first WTA title in Washington, then received praise from Nadal.
Eala stormed back to beat Pegula in Washington and claim her first WTA Tour title.
Rusedski believes Alex Eala can reach the top five if her serve takes another step.
Eala reached her first WTA 500 final in Washington and said: “I think on court coaching.”
