Laura Siegemund at 37 has been blitzing her way through the draw to the quarter finals unnoticed. Absolutely dreadful on court personality and antics but has been playing beautifully crafted and intelligent grass court tennis that has left this generation of players flummoxed this fortnight, much like Tatjana Maria at Queens. Sabalenka has the game to steamroller her but if Siegemund can get under her skin she could cause her to spray the ball so I expect Laura to be on very iffy behaviour unless she reigns it in on a show court.