The 2022 Open de Oeiras III was a professional tennis tournament played on clay courts. It was the seventh edition of the tournament which was part of the 2022 ATP Challenger Tour. It took place in Oeiras, Portugal between 20 and 26 June 2022.
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
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