Day 9 at the Australian Open saw Serena Williams inch closer to Grand Slam No. 24 and Aslan Karatsev's miraculous run stay alive.

These are the Top 5 photos for Tuesday (all photos Getty Images). 

1

Ranked No. 114, Karatsev had never played a Grand Slam main draw in his 27 years on earth. Now he's through to the semifinals after a four-set win over Grigor Dimitrov. He will attempt to oust world No. 1 Novak Djokovic, and after seeing him play all fortnight long, nothing is impossible. 

2

Grigor Dimitrov started off hot against Karatsev, but a back injury hampered his ability to serve and move properly. He finished out the match, but it may have served him better to retire as he lost,  2-6, 6-4, 6-1, 6-2. 

3

Naomi Osaka was efficient in a 6-2, 6-2 win over Hsieh Su-Wei. Though she had a winning record against the 35-year-old, the world No. 3 knew to expect a challenge. She takes on Serena Williams next in a highly-anticipated semifinal. 

4

Serena also had an efficient day in the office, easing past two-time Grand Slam champion Simona Halep, 6-3, 6-3. The American hit 34 winners to Halep's nine. The last time they had faced off was in the Wimbledon final in 2019 when Halep has won handily. 

5

While Djokovic is heavily favorite against the qualifier from Russia Karatsev, he's been dealing with an abdominal injury. Still, he performed well in his four-set win over Alexander Zverev, despite the taping on his stomach.