Table schema:
CREATE TABLE table_20079931_4 (highest_scoring_team VARCHAR, circuit_location VARCHAR, winning_team VARCHAR)

Question: What's the highest scoring team in the round in Ring Knutstorp in which Polestar Racing is the winning team?
SQL: SELECT highest_scoring_team FROM table_20079931_4 WHERE circuit_location = "Ring Knutstorp" AND winning_team = "Polestar Racing"