Brands That Sponsor Jan-Lennard Struff

Jan-Lennard Struff has been a Top 50 singles player for some time. Though he is a very good singles player, he found more success in doubles.

Struff’s game is dominated by his big serve and solid groundstrokes from the back of the court. His favorite surface is clay and loves playing at Roland Garros. He is a soccer fan and supports the soccer club, Borussia Dortmund.

His current sponsors are Diadora, Head, and Five9.

Jan-Lennard Struff’s Sponsors

Diadora

Struff has an apparel and shoe sponsorship contract with Diadora. Diadora is an Italian apparel and footwear company that was founded in 1948.

Head

Struff has a racquet sponsorship contract with Head. He endorses the Head Graphene 360 Extreme MP racquet. He strings the racquet with Babolat RPM strings. He was previously using Babolat Pure Drive racquets.

Five9

Five9 is a technology company that helps companies improve customer experience.

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Why Are Tennis Balls Yellow? Why Was The Color Changed?

According to International Tennis Federation (ITF) rules, tennis balls can be white or yellow. Yellow balls are easier to see on color TV. The official color of fluorescent yellow balls is “optic yellow”.

Older tennis fans will remember that white balls were used at most tournaments several years ago. In fact, Wimbledon started using yellow balls only in 1986.

There has been some debate on the “optic yellow” color of the tennis ball. Some have felt that tennis balls are green, and not yellow. But for the most part, tennis players and fans agree that the ball is yellow.

ITF allows the use of slower balls to increase participation in tennis. The slowest balls are red, followed by orange and green. These balls are not used in professional matches.

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