I'm playing with a friend tomorrow who strings his rackets every week
(he has 3 machines). He's a very serious player (ranked top 500 in the
country in singles), travels round the country playing tournaments.
Last time I saw him he had just lost a semi to 18 yr old kid ranked top
10.
About 5 yrs ago I had the edge on him, winning 9/10 - very competitive
matches, but I usually won 64 64 type. Now he's beaten me the last 6 or
7 times, but often close sets 64, 75, a few 62 63.
I don't take it seriously like he does. A few yrs ago we played a final
& he came in well rested & prepared, while I played 3 hrs of social
tennis just before the final & was pretty sore. Almost backfired but I
got over the line 0-6 6-3 7-6 (10-8).
I suspect he'll beat me again but will try & make him work for it. 3
weeks ago I won a singles & 2 doubles tournaments over the Easter long
weekend so will use that confidence.
The only 'customization' I need is an overgrip & consistent
racket/string tension, no grommets.