St. John 's University Having first played each other in 1909 , St. John 's is one of Georgetown 's oldest rivals . The two teams played off and on since that first contest until 1965 , when they began annually scheduled games , and they only intensified when both programs became founding members of the Big East Conference in 1979 . The rivalry was brought to national attention during the 1984-85 NCAA Division I men 's basketball season when both programs were ranked No. 1 and No. 2 throughout the season and met on a total of four occasions , including the famous " Sweater Game " at Madison Square Garden , the 1985 Big East Championship , and the 1985 Final Four . The Hoyas won 3 of the 4 matchups that year
1985 Big East Championship
1985 Big East Men's Basketball Tournament
Georgetown Hoyas men's basketball