Milos Raonic will partner with a constant companion for the rest of his playing career — and beyond.

We're not talking about the sleeve.

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Raonic has extended and strengthened his endorsement pact with New Balance, his apparel and shoe sponsor.

While financial terms of the deal were not disclosed, New Balance announced the endorsement commitment extends "Raonic’s relationship with the New Balance brand for the length of his professional playing career and beyond."

“I have been very fortunate to work alongside the great team at New Balance for the past two plus years," said Raonic during a press conference announcing the deal today at Queen's Club. "Their openness to new ideas and development of their tennis product has been something I’ve been very honored to be a part of and help develop.

“This new chapter in our relationship is something very uncommon in tennis and I am looking forward to seeing what new and creative ideas will arise as I continue to grow in this sport.”

Raonic signed with New Balance in 2013.

As a global ambassador and the original tennis athlete for New Balance, Raonic will continue to be a lead athlete in the brand's marketing and communications campaigns including print, online and in-store advertisements.

New Balance said in a statement Raonic will "continue to serve as a valuable contributor to the New Balance design and development teams on performance-driven, fashion-forward footwear and apparel that serve the needs of elite athletes and speak to the brand’s rich history in tennis and athletics."

Look for Raonic, who is active on social media, to collaborate with New Balance’s digital teams on providing unique content for athletes around tennis, training, and player improvement.