Weird 5th game: no BPs either way this set in the first 4 games but then Heather in peril after 2 DFs including a footfault call; but she also has 2 aces and holds :)
3-2*
Heather held herself together well on the key points, overall it wasn't pretty and she can play a lot better but as long as you get the win then it doesn't really matter.
Winning this type of match is much more impressive than an easy two set win, mentally when your games not clicking as you'd like its easy to get frustrated. So I'd give Heather 10/10 for battling, 10/10 for having the right mental approach but just a 6/10 for her play.
R4: (WC) Heather WATSON (GBR) 69 vs. Simona HALEP [5] 5 (CH 2 08/2014)
H2H 0-2
2014 Roland Garros, Paris, France - Grand Slam - Clay - HW(Q) SH[4] - R64, SH won 6-2 6-4
2013 US Open, NY, USA - Grand Slam - Hard - SH[21] - R128, SH won 4-6 6-4 6-2
Jo and Heather I think are vying to be the first Brit to reach both L16 at Indian Wells & Miami in their career, and Jo would definitely be the first to do it in the same year.
Only Heather (2015), Jo (2016) and Clare Wood (1993) have ever made the last 16 at Indian Wells. Clare Wood never played in Miami as such, it was before her time, or called the Lipton Championships or other things. She did however reach the last 32 of it's strict predecessor, Key Biscayne, in 1991.
As this is Jo's debut in Miami and she is yet to play her R3, Heather is indeed the first Brit ever to reach the Last 16 of each of the top tier multi-week, non-slam, US events. Let's hope that select group swells to two members before the weekend is out
And greedily that there is healthy competition for first to make the QF, SF... total world domination! M'wah ha ha! (Oops! that was supposed to be sotto voce!)