Here’s the challenge: you’ll see a group of emojis that all look similar at first glance. But—there’s one emoji that’s different from the rest! Can you spot it in just 3 seconds?

The WTA has created a second Emoji Challenge video, with the top stars of the women's tour doing their best impressions of the expressive texting icons: Petra Kvitova, Agnieszka Radwanska ...