Crossword puzzle clue "open house perhaps"

"House" and "Little House ...," but not "Full House"

Open house, perhaps

House-to-house number, perhaps

Rare occurrence at the U.S. Open on Father's Day that's a common occurrence at the U.S. Open on Labor Day

US Open and French Open feats

2004 French Open and U.S. Open runner-up Dementieva

Woman who won the Australian Open and US Open in 1997 without losing a set: 2 wds.

Tennis player who has won an Open Era record six women's singles titles at the Australian Open: 2 wds.