HOUSTON – Lauren Murphy knows she’s a big underdog against UFC flyweight champion Valentina Shevchenko , but she’s used to it. Murphy (15-4 MMA, 7-4 UFC) challenges Shevchenko (21-3 MMA, 10-2 UFC) for the women’s flyweight title in the co-main event of UFC 266 on Sept. 25 in Las Vegas, where she’ll look to dethrone the dominant champion
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