Have Sergey Kovalev and William Johnson ever fought each other?

Yes. Sergey Kovalev and William Johnson met once on March 12, 2011, and Sergey Kovalev won by TKO in round 2.

Who has the better record, Kovalev or Johnson?

Sergey Kovalev is 36-5-1 and William Johnson is 0-10 across the 10 bouts Kill The Body has tracked. Sergey Kovalev has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.

Who has more knockouts, Kovalev or Johnson?

Sergey Kovalev has 30 knockout wins and William Johnson has 0. Sergey Kovalev has more.

Do Kovalev and Johnson have any common opponents?

Sergey Kovalev and William Johnson share 1 common opponent: Darnell Boone. Sergey Kovalev fared better against 1 of them.

How much fight data does Kill The Body have on Kovalev and Johnson?

This comparison is drawn from 42 bouts tracked for Sergey Kovalev and 10 bouts tracked for William Johnson. Method and activity splits reflect those bouts only.

Sergey Kovalev vs William Johnson — Records, Stats & Common Opponents

🇷🇺RUSSIA

Sergey Kovalev

William Johnson

Sergey Kovalev (36-5-1) and William Johnson (0-10 across 10 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Kovalev

Wins30 KO · 83%

Losses

Draw42 tracked bouts

Johnson

Tracked record

0–10

counted from 10 bouts Kill The Body has ingested

Heads up: at least one of these records is a tracked record — the wins and losses Kill The Body has ingested so far, not an independently verified career total. Treat the comparison as a read on the bouts we hold, not a settled ledger.

Head to Head

Kovalev leads 1–0

Sergey Kovalev and William Johnson have met 1 time; Kovalev leads 1–0.
Met	2011Mar 12	Series
Sergey KovalevFighter A	WWon	1–0W–L
William JohnsonFighter B	LLost	0–1W–L
Result	TKOR2Kovalev vs Johnson	1Meeting

Kovalev vs Johnson · Mar 12, 2011

The Numbers

Kovalev 6 · Johnson 0 of 6 measurable rows

KovalevEdge = longer wingJohnson

Record^†: 36-5-1 (edge)0-10
Win %0–100%: 86.9% (edge)
0%
Wins by knockoutmax 30: 30 (edge)
0
KO ratenot comparable: 83.33%—
Stoppage rate (tracked wins)^‡not comparable: 83%—
Times stopped^‡max 7: 3 (edge)
7
Title reignsmax 5: 5 (edge)
0
Bouts per year^§max 2.7: 2.7 (edge)
0.9
Bouts trackedcoveragemax 42: 42
10

† One or both records are tracked, not career-verified. · ‡ Counted from bouts Kill The Body has ingested, not a career total. · § Across each fighter's tracked career span. · Bars are scaled per row — percentages on 0–100, counts against the larger of the two. Every figure is also printed as text.

Tale of the Tape

Heightnot held: Sergey Kovalev: 6′0″; William Johnson: No height on file
Reachnot held: Sergey Kovalev: 72″; William Johnson: No reach on file
Agenot held: Sergey Kovalev: 43; William Johnson: No date of birth
Stance: Sergey Kovalev: Orthodox; William Johnson: Not recorded

Sergey Kovalev left, William Johnson right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only

Sergey Kovalev36 wins · from 42 tracked bouts

30 by KO/TKO 83%6 on the cards 17%

William Johnson0 wins · from 10 tracked bouts

No tracked wins for Johnson yet.

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Sergey Kovalev 42, William Johnson 10 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · Kovalev better on 11 shared · Sergey Kovalev better on 1

KovalevSergey Kovalev

Opponent

JohnsonWilliam Johnson

Sergey Kovalev
2–0 against
Win, TKO 2
2012Jun 2012
Win, SD
2010Oct 2010
BooneDarnell BooneUnited States 24–28–6Kovalev betterSergey Kovalev better — 2–0 to 0–1
William Johnson
Loss, UD
2006Nov 2006

Both sides are set at the same size on purpose. Kill The Body does not score a second-round knockout above a split decision — the edge counts losses first and wins as the tiebreak, and the rest is yours to argue. Shared opponents are matched on fighter identity, not on name, so two different fighters with the same name never merge into one row.

Current Form

Oldest left · newest right

Sergey Kovalev has won once since losing a decision to Robin Sirwan Safar. Kovalev last boxed on Apr 18, 2025 — 548 days ago.WLWLW

Yarde Aug 2019Álvarez Nov 2019Pulev May 2022Safar May 2024Mann Apr 20252.7 tracked bouts per year

William Johnson last boxed on Mar 26, 2016 — 3,858 days ago. Johnson had lost ten straight.LLLLL

Dirrell Dec 2007Gilbert Nov 2008Kovalev Mar 2011Kalajdzic May 2015Jr. Mar 20160.9 tracked bouts per year

Common Questions

With the rows behind them

Have Sergey Kovalev and William Johnson ever fought each other?: Yes. Sergey Kovalev and William Johnson met once on March 12, 2011, and Sergey Kovalev won by TKO in round 2.
Who has the better record, Kovalev or Johnson?: Sergey Kovalev is 36-5-1 and William Johnson is 0-10 across the 10 bouts Kill The Body has tracked. Sergey Kovalev has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Who has more knockouts, Kovalev or Johnson?: Sergey Kovalev has 30 knockout wins and William Johnson has 0. Sergey Kovalev has more.
Do Kovalev and Johnson have any common opponents?: Sergey Kovalev and William Johnson share 1 common opponent: Darnell Boone. Sergey Kovalev fared better against 1 of them.
How much fight data does Kill The Body have on Kovalev and Johnson?: This comparison is drawn from 42 bouts tracked for Sergey Kovalev and 10 bouts tracked for William Johnson. Method and activity splits reflect those bouts only.

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Sergey Kovalev vs William Johnson — record, stats and common opponents compared

Sergey Kovalev

William Johnson