Tennis

6 ways to blow your cash at the US Open

You can’t say American Express, one of the US Open’s signature sponsors, doesn’t give you fair warning about your wallet when visiting America’s grand slam event: Don’t leave home without it.

Before you check out the annual tennis tourney that kicks off on Monday, take a look some of the overpriced merch that awaits you at Flushing Meadows:

Beach towel

Evian facial water spray

Disregard the fact NYC water is one of the cleanest and best-tasting in the country, and make way for the “Official Bottled Water of the US Open” — Evian — with its fancy accoutrements and prices to boot. The facial water spray cools you down after getting heated about coughing up $12 for it.

Coffee mug

If you can swallow these prices, you can swallow anything — but make sure you do it in style with this official USTA mug ($20).

Umbrella

If the skies do darken over Flushing Meadows, fear not — this wet-weather essential ($62) has been wind-tested by College of Aeronautics to 55-plus mph.

Jumbo tennis ball

Kids love to get their favorite players to sign these oversize, 9-inch US Open favorites ($35). Plus it’s pink, so you really know it’s authentic.

Pretend like you don’t have your 20 percent Bed, Bath and Beyond coupon waiting at home, and enjoy a fluffy US Open towel ($36).

Moët & Chandon Terrace

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The Moët & Chandon Terrace pours out its eponymous Imperial Champagne — because why not go into bankruptcy with a bang!