Thatch point! Roger Federer ribs Andy Murray's hairstyle on Twitter

    Story highlights

    • Tennis legend Roger Federer exchanges hairstyle tips with Andy Murray
    • The men discuss curls, smoothness and "being worth it" over Twitter
    • The sport is no stranger to funky hairstyles over the years
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    (CNN)What does 17-time Grand Slam winner Roger Federer have to talk about with World No. 4 Andy Murray?