I like Rybarikova at +4. Muguruza has been playing well, but Kerber wasn't in top form and Kuzetnesova at age 32 is not an elite player anymore. Rybarikova beat the tournament favorite, Pliskova, and also dominated vandeweghe. Rybarikova is a defensive player who is 18-1 her last 19 grass matches, and if she gets an aggresive player Muguruza into longer points I think she will struggle to be consistent.