Virginia, the only lacrosse team to defeat John Hopkins in 47 games, gets a chance today to bring another Blue Jay victory streak to an end. If the Cavaliers can stop Hopkins' 21-game streak in today's semifinal game of the NCAA championship tournament at Homewood Field in Baltimore (2 p.m.), they will also foil Hopkins' quest for a fourth straight title.

Henry Ciccarone, coach of the 12-0 Jays, is not expecting Virginia (9-3) to exert extra effort to stop Jeff Cook (45 goals on 84 shots) or Brendan Schneck (28 goals). Schneck, last season's player of the year, has attracted special attention since scoring six goals in a 15-13 win over Virginia this year, although he has only seven goals in the last five games.

"They may even try to go the other way," Ciccarone said of Virginia, which defeated the Jays, 12-9, on April 5, 1980. "They may try to concede Cook and Schneck their three or four goals and try to shut down everyone else. It's something they've done before."

In the other semifinal game today, Navy (7-4) will be at Chapel Hill for a meeting with North Carolina (10-0). Both teams rely heavily on defense, but Navy has been forced to use reserve goalie Pat Brannigan in the playoffs because of an injury to Scott Bartkowski