NEW YORK—Tennis and timepieces: a mixed doubles match made in heaven.

What more can a luxury watch manufacturer ask for? Signing a tennis star as a global ambassador means exposure on an international tour that stops at the world’s wealthiest cities, from New York City to Dubai to Shanghai, and plays year-round.

Read More: Wilson teams up with New York Sunshine for limited-edition US Open collab

While Rolex may be the official timekeeper of the US Open, this year’s Grand Slam has had an eclectic collection of ultra-niche and extremely luxurious watches that have also been turning heads in Flushing Meadows.

From Jessica Pegula’s $99,000 watch by De Bethune to Grigor Dimitrov’s high-tech Bianchet timepiece, these are tennis accessories on a whole 'nother level.

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No. 3 seed Jessica Pegula (USA) — De Bethune

No. 3 seed Jessica Pegula (USA) — De Bethune 

No. 14 seed Tommy Paul (USA),  No. 13 seed Emma Navarro (USA) — De Bethune

No. 14 seed Tommy Paul (USA),  No. 13 seed Emma Navarro (USA) — De Bethune

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Tommy Paul and Emma Navarro in De Bethune

Watch: DB28 xs Starry Seas
Retail: $90,000 USD

Former No.1 Naomi Osaka (JPN) — TAG Heuer

Former No.1 Naomi Osaka (JPN) — TAG Heuer

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No. 5 seed Daniil Medvedev (RUS) — BOVET 1822

No. 5 seed Daniil Medvedev (RUS) — BOVET 1822

Daniil Medvedev in BOVET 1822

Watch: Récital 12
Retail: CHF 24,800 (approx. $30,000 USD)

No. 6 seed Andrey Rublev (RUS) — Bulgari

No. 6 seed Andrey Rublev (RUS) — Bulgari

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No. 24 seed Donna Vekic (CRO) — F.P. Journe

No. 24 seed Donna Vekic (CRO) — F.P. Journe

Donna Vekic in F.P. Journe

Watch: élégante 40
Retail: N/A

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No. 9 seed Grigor Dimitrov (BUL) — Bianchet

No. 9 seed Grigor Dimitrov (BUL) — Bianchet

Grigor Dimitrov in Bianchet

Watch: B1.618 Grande Date Flying Tourbillon
Retail: 65,000 CHF (approx. $76,000 USD)

No. 1 seed Jannik Sinner (ITA) — Rolex

No. 1 seed Jannik Sinner (ITA) — Rolex 

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No. 1 seed Iga Swiatek (POL) — Rolex

No. 1 seed Iga Swiatek (POL) — Rolex 

Iga Swiatek in Rolex

Watch: Lady-Datejust
Retail: $30,000 USD

Suggested retail prices.