Marko Topo (Serbian Cyrillic: Марко Топо; born 13 September 2003) is a German tennis player.

[3] In September 2021, he obtained his first Challenger level win, in Banja Luka, thanks to a wildcard, defeating compatriot Danilo Petrović 4–6, 7–6, 6–2.

In the next round he then defeated Vitaliy Sachko, winning 7-6 in the third set, thus reaching the quarterfinals and landing in the top 1000 for the first time.

In April 2022, he got a qualification wildcard for the ATP tournament in Munich, where he defeated fourth seed Henri Laaksonen in straights sets and Norbert Gombos in three sets to qualify for his second ATP main draw, where he lost to the German Oscar Otte in the first round.

[4] In Hamburg, he qualified for his first ATP 500 tournament after receiving also a wildcard but lost in the first round to Alex Molčan.