The quartet join a field which includes a host of European Tour winners and Ryder Cup players as the 2019 season reaches its climax with just four events left to play following the Portugal Masters.
Kaymer, who won the U.S. Open Championship at Whistling Straits in 2010, will make his first appearance at the Portugal Masters since 2015. The German, who has played in four Ryder Cups, has a quartet of top-20 finishes this season and is looking to secure his place in the final three events on the 2019 Race to Dubai.
“It’s an event I’ve always enjoyed playing,” said Kaymer. “The move to October has given me the opportunity to add it to my schedule again. “I’ve had some encouraging results this season, but it’s my goal to make the last three tournaments on the Race to Dubai, so Portugal gives me a great opportunity to take some momentum into those events.”
Harrington, who will captain Europe at Whistling Straits in next year’s Ryder Cup, won his first European Tour title in eight years when he was crowned champion at the 2016 Portugal Masters. “I’m really looking forward to coming back to Dom Pedro Victoria,” said Harrington.
“It’s a golf course which suits me, and it’s always nice to return to a venue where you have won before.
“We might be nearing the end of the season, but there’s still a lot for everyone to play for. It should be an exciting week.”
Wallace has happy memories of Portugal after securing the first of his four European Tour titles at the Open de Portugal in 2017.
The Englishman reached a career-high position of 23rd in the Official World Golf Ranking earlier this season and is currently fourth in the
Race to Dubai Rankings Presented by Rolex.