That first serve percentage can be so very important in women's tennis, with players often able to launch against the second service and at least immediately get ahead in the rally.
First set gone 3-6 :(
Katie heavily outranked here, of course, but hopefully she can shake off her nerves (the DF count isn't helping) and stage a fight-back...
As the match enters a second hour, you'd have to favour the older, more experienced player to last longer, and hold her nerve better in critical moments.