The 2025 Maia Challenger was a professional tennis tournament played on clay courts. It was the eighth edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Maia, Portugal from 24 to 30 November 2025.
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw using protected rankings:
The following player received entry into the singles main draw as a special exempt:
The following player received entry into the singles main draw through the Next Gen Accelerator programme:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers: