Serena Williams says the timing of Nike's 'The queen is back' campaign was awkward due to its proximity to the wedding of her friend Meghan Markle to Prince Harry. 'It was all really exciting to see so much African-American culture impacted in the wedding,' she says. 'I was really happy Meghan wanted to incorporate that into it. I think it was just a whole cultural shift and change. It was seeing how far African-Americans have come. I thought it was an incredibly inspiring and beautiful and really motivating thing.'