Michelle Obama marks end of an era with tribute message to Serena Williams following retirement
Michelle Obama often shares snippets of her life on social media and is a great cheerleader for those she admires and cares about.MORE: Michelle Obama reveals sad news about daughters Malia and SashaMost recently, the former FLOTUS took to Instagram to pay tribute to her friend, tennis champion Serena Williams, following the news of her retirement.Michelle shared a series of photos of the pair together from over the years, including pictures of her cheering Serena on in the crowds during a tennis tournament.VIDEO: Michelle Obama gives rare glimpse into family lifeIn the caption, she wrote: "Serena, thank you for everything that you've done to break barriers and to be a positive light in this world.MORE: Malia Obama steps out in sporty look following birthday celebrationsREAD: Barack Obama mourns sad family death with heartbreaking tribute"We've all watched you wear the crown of greatness with the kind of humility, grace, and integrity that all of us can aspire to. It has meant so much to follow your journey as an athlete, as a mother, as a business leader, and more.