#USTennis is on 🔥! A whopping 10 Americans won their first-round matches in Dubai, Rio and Delray Beach. Send a 🔟 for an awesome start this week! #cicibellis #donaldyoung #reillyopelka #tennyssandgren #donaldyoung #johnisner #stevejohnson #francestiafoe #jareddonaldson #jacksock #tennis #atp #wta