Former sprint freestyle world record holder Eamon Sullivan of Australia pulled out of the upcoming world championships in Rome later this month.

Sullivan has been battling a virus, which forced him out of two recent events, and will undergo more tests in Australia. The 23-year-old was entered in the 50 and 100 freestyle events. Bremerton’s Nathan Adrian won both the 50 and 100 this week at the U.S. nationals in Indianapolis. 

With neither Sullivan, nor Michael Phelps swimming in the 100 free, it opens the door for Adrian. Phelps pulled out of the 100 free at nationals because of a stiff neck. He is swimming in the 100 butterfly, 200 fly, 200 free and will likely swim in three relays.

Cullen Jones set an American record in the 50 free on Saturday at nationals, in 21.41 seconds, faster than Adrian’s time of 21.52 he had in winning the 50 on Thursday.

The swimming championships begin July 26-Aug. 2.