Israeli world No.48 Shahar Peer has been denied entry into the United Arab Emirates for the Barclays Dubai Tennis Championships, and will hence not be able to play the tournament which features all the world's top-10 ranked women's players and for which she is qualified by ranking.
UAE have not explained the reason for not giving Peer a visa, but the country does not have diplomatic relations with Israel.
WTA chief executive Larry Scott said the women's tour was "deeply disappointed" by the decision.
"Ms Peer has earned the right to play in the tournament and it's regrettable that the UAE is denying her this right," he said.
"Ms Peer and her family are obviously extremely upset and disappointed by the decision of the UAE and its impact on her personally and professionally."