Heather would face either (WC) Kayla Day or a Q/LL if she gets past Loeb.
Naomi would face Lepchenko or an Aussie WC (who I'm not familiar of, Haet) if she gets past her TBC 1st round opponent. Could face top seed Bencic again in the quarters, but that's maybe too wishful thinking.
'Boulter Watch' - Monica Niculescu faces Asia Muhammad and then a guaranteed Q/LL in order for her to get to the QF that she would need to pass Boulter. Nicole Gibbs opens up against the 8th Bouzkova.
Potential Qs for Naomi include:
Ann Li - who Naomi beat a few weeks ago, but Heather lost to
Osuiqwe - former top junior who won 80k in her last outing 7 days ago, beating Bencic and Haddad Maia en route. Also comfortably beat Swan earlier in the year
Lauren Davis - seeded at Wimbledon 2017, but a big fall in the rankings
Kucova - reached a WTA international QF last month, beating Ostapenko.
Michaela Haet is a Rice Owl (Texas college which Natalie Beazant attended). Had some decent success on ITF your in early 2017 before starting at Rice (winning a $15k) but I would surprised if she beat Lepchenko.
'Boulter Watch' - Monica Niculescu faces Asia Muhammad and then a guaranteed Q/LL in order for her to get to the QF that she would need to pass Boulter. Nicole Gibbs opens up against the 8th Bouzkova.
Niculescu withdraws with a right foot injury. Nicole Gibbs moves into her position as 9th seed in the draw.
Tough draw for Naomi up against a potential future super star. Rapidly developing elite juniors probably the biggest cause of underranking inside the top 250. Good luck to Naomi she may need it.
There were breaks - Naomi trailed 2-4 and 3-5. But lost out 3 breaks to 2. Her serve doesn't look very potent at the moment, 70% first serves in, only 59% won.