Khalid Abdullah's unbeaten Siskin (First Defence) renews rivalry with 'TDN Rising Star' Monarch of Egypt (American Pharoah) in Friday's G1 Keeneland Phoenix S. at a Curragh venue currently threatened by the possibility of huge amounts of rain. First and second in the course-and-distance G2 Railway S. on fast ground on June 29, they are both bred to be compromised by the prospect of soft ground. Siskin, who also captured the May 24 Listed Marble Hill S. here, has two other Ballydoyle representatives to contend with including the G2 July S....