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Alexander Ko

San Marino, CA
4.5C year-end 2025
i
Computer — generated by the USTA algorithm from match play
20 matches · 9W–11L · seasons 2025–2026

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Match history20 matches
L
2026-06-14 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #1 Doubles · 4.5 · with Michael Cheng
expectation pending — we’re still fetching an opponent’s record
2-6, 4-6
W
2026-05-30 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #2 Doubles · 4.5 · with Alan Han
expectation pending — we’re still fetching an opponent’s record
5-7, 6-1, 1-0
W
2026-05-16 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #2 Doubles · 4.5 · with Michael Cheng
expectation pending — we’re still fetching an opponent’s record
7-6, 6-3
W
2026-05-09 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #1 Singles · 4.5
expectation pending — we’re still fetching an opponent’s record
6-1, 6-2
L
2026-05-03 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #3 Doubles · 4.5 · with Leonardo Kim
expectation pending — we’re still fetching an opponent’s record
4-6, 3-6
L
2026-04-26 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #3 Doubles · 4.5 · with Nicholas Ambrosio
expectation pending — we’re still fetching an opponent’s record
4-6, 6-7
L
2026-04-19 · SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12 · #3 Doubles · 4.5 · with Nicholas Ambrosio
expectation pending — we’re still fetching an opponent’s record
7-5, 4-6, 0-1
W
2026-03-22 · SGV Noobies A-Han-San Marino HS/SA2 · #2 Singles · 4.5
expectation pending — we’re still fetching an opponent’s record
6-0, 6-0
W
Gregory Gerardo / Lindsey Harpmixed
2026-03-14 · SD 8.0 UCSD/ Lee · #2 Doubles · 8.0 · with christine nishiyama
doesn’t count toward your NTRP rating
6-3, 6-7, 1-0
L
2026-03-14 · SD 9.0 UCSD/ Ko · #3 Doubles · 9.0 · with An Nguyen
doesn’t count toward your NTRP rating
6-4, 3-6, 0-1
W
2026-03-07 · SGV Noobies A-Han-San Marino HS/SA2 · #1 Singles · 4.5
expectation pending — we’re still fetching an opponent’s record
6-2, 6-1
L
2026-02-15 · SD 9.0 UCSD/ Ko · #1 Doubles · 9.0 · with Vivian Lee
doesn’t count toward your NTRP rating
0-6, 5-7
Where you rank locallyagainst everyone at your level
Teams8 teams · 2025–2026
SD 8.0 UCSD/ Lee
2026 Mixed Doubles 18 & Over Winter - SD · SD - 8.0 · 18+
2026
SD 9.0 UCSD/ Ko
2026 Mixed Doubles 18 & Over Winter - SD · SD - 9.0 · 18+
2026
SGV LLW Noobies- Petrocelli-San Marino HS/SA10/12
2026 Adult Division - 18 & Over San Gabriel Valley · SGV - Men 4.5 · 18+
2026
SGV Noobies A-Han-San Marino HS/SA2
2026 Winter Team Singles · SGV - Men 4.5
2026
SGV Noobies A-Han-San Marino HS/SA2
2026 SoCal Fall Team Singles · SGV - Men 4.5
2026
Over timerating by season, and how you rank
By level3 levels played
4.5
46.7%
7W–8L · 56.8% of games
8.0mixed
1W–0L
not enough matches yet
9.0mixed
25%
1W–3L · 44% of games

Games won matters more than matches won — NTRP adjusts on margins.

Not affiliated with or endorsed by the USTA. Ratings labelled as published are USTA year-end figures; anything we describe as an estimate is ours, not USTA’s. Match data is from USTA TennisLink.

Champions keep playing until they get it right.
Billie Jean King