German hopeful Zverev lifts his maiden ATP Finals title

Alexander Zverev of Germany celebrates with the ball kids after the singles final against Novak Djokovic of Serbia during Day 8 of the 2018 Nitto ATP World Tour Finals at The O2 Arena in London, Britain on Nov. 18, 2018. Alexander Zverev won 2-0. (Xinhua/Han Yan)