Serena Williams is back. Tennis great has wild-card for Wimbledon warmup

from the tennis world — and beyond. Caroline Wozniacki, one of Williams’ closest friends and herself a Grand Slam champion, responded with a fire emoji and clapping hands. Lindsey Vonn, who made her own comeback after almost six years away from Alpine skiing, wrote, “LFG!!!” with two bicep emojis. Track star Allyson Felix, who recently announced her continue reading …