2020 Lisboa Belém Open

Country	Player	Rank1	Seed
ESP	Jaume Munar	109	1
POR	Pedro Sousa	113	2
BIH	Damir Džumhur	114	3
ITA	Paolo Lorenzi	130	4
ITA	Federico Gaio	132	5
NED	Tallon Griekspoor	139	6
SLO	Blaž Rola	148	7
POR	João Domingues	161	8

• ¹ Rankings are as of 28 September 2020.^[1]

The following players received wildcards into the singles main draw:

• Nuno Borges
• Gastão Elias
• Gonçalo Oliveira

The following player received entry into the singles main draw as a special exempt:

• Damir Džumhur

The following players received entry from the qualifying draw:

• Guilherme Clezar
• Borna Gojo
• Dimitar Kuzmanov
• Sebastian Ofner

• Jaume Munar def. Pedro Sousa 7–6^(7–3), 6–2.

• Roberto Cid Subervi / Gonçalo Oliveira def. Harri Heliövaara / Zdeněk Kolář 7–6^(7–5), 4–6, [10–4].