Drob
Hall of Fame
Bowers writes this as he concludes his chapter for 1938 (http://www.tennisserver.com/lines/lines_05_07_30.html):
Even as he talked of leaving the game, Ellsworth Vines's greatest challenges lay just ahead. For five years as a pro Elly, now 28, had defeated all comers, primarily in extended North American tours. His body was no longer the slender and supple specimen of the former basketball star. There had been eternal back and perhaps shoulder troubles along with other wear-and-tear aches from the many matches on hard surfaces. If his yearning for golf suggested tennis burn-out, still the competitive flame remained strong, seen in his strong finish against Perry in May 1938. His two-year edge over Fred had been hard-won, and it probably owed most to his powers of concentration and determination, his superior ability to resist distraction. The forehand now had a bit more spin than five years ago, probably more sidespin than top, for control, and the backhand had improved hugely. The all-out serve was a shade less overpowering from the years, certainly a lesser asset in reflection of Perry's fine return ability, though Elly's overall serving ability remained a dependable weapon even on nights where his groundstrokes misbehaved. The drop-shot knack was a valuable addition, but in essence Elly was still the baseline power player, with little margin for error either in clearing the net or in staying within the lines.Don Budge was in Elly's immediate path, but also ahead were long-awaited face-offs with Nusslein in Europe. Nusslein, also 28, was also approaching a crossroads....
Vines 28 in 1938? No, he turned 27 on Sept. 28, 1938 and was 27-years old throughout the effective 1939 season. Optimum tennis age.
And I think your own findings regarding ace counts suggest Vines was serving better than when he was younger. Bowers repeatedly says the BH was stronger. In other places he talks of other improvements as result of the Perry wars. In all, my guess is Vines had more tennis ability, and certainly more strength, going into 1939 than at any time in his career.