Each week I will endeavor to bring you a list of USAmerican players who have reached a new career-high ranking. This list is not exhaustive but will cover most players in the Top 1000.
New WTA Career-High Rankings - June 23, 2014 (previous high & date achieved in parentheses)
Madison Keys -- 30 (36 - 10/14/2013)
CoCo Vandeweghe -- 51 (69 - 7/16/2012)
Victoria Duval -- 114 (115 - 5/26/2014)
Taylor Townsend -- 147 (148 - 6/16/2014)
Nicole Gibbs -- 150 (152 - 6/16/2014)
Louisa Chirico -- 268 (302 - 2/3/2014)
Career performances by Keys and Vandeweghe in Eastbourne and s-Hertogenbosch, respectively, are rewarded by big ranking jumps. Chirico was similarly rewarded for her $25K win a week ago in Italy, and will move up again after Wimbledon thanks to her $25K final this week. Duval and Gibbs were playing Wimbledon qualies (which won't show up until after the full fortnight is completed). They and Townsend moved up because a couple of others dropped down. Unusual not to see any* lower-ranked women with new CHRs but that's mostly because of a pause in USTA Pro Circuit events, which started to be rectified this week (in which we saw four Bethany Beach $10K semifinalists from the USA) and will show up in the post-Wimbledon rankings.
New ATP Career-High Rankings - June 23, 2014 (previous high & date achieved in parentheses)
Mitchell Krueger -- 330 (349 - 6/16/2014)
Evan King -- 432 (436 - 6/16/2014)
Noah Rubin -- 539 (542 - 6/16/2014)
Devin McCarthy -- 696 (738 6/16/2014)
Peter Kobelt -- 873 (1126 6/16/2014)
Conversely, there are no US men above 300 who achieved career highs. Three guys who did, though, had nice big jumps thanks to their work last week in Futures events in Israel (Kobelt & McCarthy) and Italy (Krueger). Kobelt's jump comes a week after his jump from #1947 - so he's shaved over 1,000 spots off his ranking and will go higher after Wimbledon. Krueger, meanwhile, has set a new CHR each of the last four rankings, improving from #405. Rubin has done the same, improving from #591.
As mentioned, the next rankings for both men & women will come after Wimbledon (as well as the Winnetka Challenger and quite a few ITFs) so we will likely see a quite a few names on the list.
*There may be some among women below ~750 whom I don't track. If you know of any, please share!