Rafael Nadal battles back to take the fourth set against Alexander Zverev and send it into a decider. Earlier, Serena Williams secured a straight-set win over Nicole Gibbs.
- Serena beats fellow American Gibbs to advance
- Agassi on Kyrgios: Don't judge him too harshly
- Federer needs 90 minutes to reach 4th round
- Venus cruises to 4th round in straight-sets win