Whistle Sports, a service that curates and distributes sports-related content targeted to younger viewers, has raised a series D round that was led by Aser.

Liberty Media, Emil Capital, and Jeffrey Katzenberg’s WndrCo are among others that participated in the round, which takes Whistle Sports’s total funding close to $100 million.

Whistle Sports, which notched a $20 million C round in March 2016, said the fresh funds will be used to expand original content development with partners such as Dude Perfect and The F2, and help to speed its move into markets such as Asia and Europe.

As part of a wider collaboration, Aser will also tie in help from its subsidiaries, including Eleven Sports, and help with Whistle Sports’s international expansion. Eleven Sports is currently in ten markets following recent moves to the U.K., Ireland and Portugal.

Whistle Sports launched in 2014 and claims to have an aggregate social audience of over 450 million subscribers, followers and fans that, last month, viewed 1.7 billion videos across the 2,000 channels in the Whistle Sports network.

Privately held Whistle Sports said it has a library of more than 560,000 videos and revenues that have seen a 52% year-on-year growth rate.

Other investors include NBC Sports, Sky Sports, Tegna and U.K.-based venture-capital firm Beringea.

Whistle Sports, a digital sports content aggregator focused on millennial audiences, said it has landed a $20 million “C” round of funding from TEGNA, NBC Sports Ventures, Sky and Emil Capital.

Whistle Sports, which announced a $28 million “B” round in January 2015 from a group that included  Sky and Liberty Global, has raised a total of about $60 million.

Launched in 2014, Whistle  Sports, which counts go90 among its digital distribution partners, said it reach recently reached an aggregate of 170 million across all its social channels, and that the service’s user base has been growing by more than 2 million each week.  

Whistle Sports’s core audience is age 14-30, though the service sees “a lot of movement on both sides of those numbers,” company exec Brian Selander told Multichannel News in an interview last fall (subscription required).

“Whistle Sports has activated and inspired a new generation of sports fans and followers. Our strength in distribution coupled with their innovative content, will create numerous opportunities for both companies to grow across platforms,” said Gracia Martore, president and CEO of TEGNA, in a statement. “This investment and strategic partnership will not only enable both of our companies to reach valuable new audiences, it will also combine our respective expertise to create more innovative content and advertising solutions.”

“Whistle Sports has successfully captured the imaginations, attention and engagement of millennial sports fans, and consistently delivers compelling content and options to brands and agencies eager to connect with that critical and growing demographic,” added Rick Cordella, SVP and GM, digital media, at NBC Sports Group. “Whistle Sports has proven to be a reliable source of original and creative content, and their data-driven approach to developing new audience insights sets them up for an even stronger future”