Former Chicago Bears star pass rusher Khalil Mack, now with the Los Angeles Chargers, is contemplating his next move. For the first time in his NFL career, Mack enters the offseason as an unrestricted free agent, but according to ESPN , he's mulling retirement after a 12-year career.

American Alex Michelsen claimed the biggest win of his career when he stunned Stefanos Tsitsipas 7-5 6-3 2-6 6-4 in the first round of the Australian Open on Monday as the Greek 11th seed became the first major casualty at Melbourne Park.

In three seasons, Mack and Bosa have shared the field for only about a quarter of the snaps. Still, they've developed an unbreakable bond.