Jeff Borowiak has a competitive clay court record of 97–90 across 187 matches (51.9%). The record shows a player capable of competing here, though there is clear room to push the win rate higher. Claimed 3 titles on clay: Charlotte WCT, Gstaad, Toronto-2.

At Grand Slam level (Roland Garros): Jeff Borowiak is 5–7 (41.7%) across 12 Grand Slam matches — below .500, though the elite draw depth at the Slams makes that a notoriously difficult barrier to crack.

4 finals reached on clay — converted 3 into titles (outstanding 75% conversion rate). Converting finals at that rate separates champions from contenders. 7 semifinals. 23 quarterfinals.

vs. Top 10 on clay: 3–14 (17.6%, 17 matches). Top 10 opponents have represented a clear ceiling on clay; addressing that deficit is the single biggest lever for improving the overall record here.

By format on clay — best-of-five: 4–4 (50.0%); best-of-three: 93–86 (52.0%). Consistent regardless of format on clay — a sign of a well-rounded game that holds up as matches develop.

Peak season: 1977 — 19–5 (79.2%) from 24 matches. That year captures the ceiling of what Jeff Borowiak can do on clay when performing at their best and represents the standard to aim for.