(CNN) -- Israel's Shahar Peer continued her superb run at the Dubai Open by beating Li Na of China to reach the semifinals of the WTA Tier One tournament on Thursday.





Peer progressed to a match-up with Venus Williams as Li, who reached the semifinals of the Australian Open, retired with a back injury when trailing 5-7 0-3.





Peer, who was refused entry to the United Arab Emirates for last year's tournament, is posing a security problem for organizers, who have scheduled her matches on an outside court with restricted access.





With tensions high after last month's assassination of a senior Hamas official in Dubai, placing Peer on the 5,000 capacity Center Court for her last four clash is a step they may be unwilling to take.





Peer, who has been in fine form in 2010, beat top seed Caroline Wozniacki to reach the quarterfinals and said after the match that despite the controversies in the past she was receiving a good reception.





"I get really amazing treatment here and they are so nice to me, all the people around me that are taking care of me," she told the official WTA Tour Web site.





Against world number 10 Li, she was always on top as she headed for her fourth straight win in the tournament and her first over the highly-rated Chinese player.





Defending champion Venus Williams showed her liking for the venue with a straight sets 6-3 6-4 win over promising young Russian Anastasia Pavlyuchenkova in their quarterfinal later on Thursday.





In other quarterfinal action, seventh seed Agnieszka Radwanska of Poland saw off Russian qualifier Regina Kulikova in three hard-fought sets, 3-6 6-4 6-3.





She will play fourth seed Victoria Azarenka of Belaus who brushed aside Russian Vera Zvonareva 6-1 6-3 to reach the last four.
What is the tournament called? Who will now face Peer? Who played all her matches on a restricted access outside court? Who reached the semi finals? Which country is the championship in? Who reached the semifinals of the Dubai Tennis Championship? Who reached the semi finals of the Dubai tennis championship?
WTA Tier One Venus Williams Peer, Shahar Peer United Arab Emirates Shahar Peer Shahar Peer
question: What is the tournament called?, answer: WTA Tier One | question: Who will now face Peer?, answer: Venus Williams | question: Who played all her matches on a restricted access outside court?, answer: Peer, | question: Who reached the semi finals?, answer: Shahar Peer | question: Which country is the championship in?, answer: United Arab Emirates | question: Who reached the semifinals of the Dubai Tennis Championship?, answer: Shahar Peer | question: Who reached the semi finals of the Dubai tennis championship?, answer: Shahar Peer