Name this great Argentine tennis player

Today’s question: He was called the “Young Bull of Pampas” during his playing days. Though he never reached the number one spot, this left-hander won four Grand Slam titles, and in 1977 won an incredible 130 singles matches and 16 singles titles. He also held the open era record for the longest winning streak on clay courts (53 matches) before Rafael Nadal bettered it. Which Argentine great are we talking about?

Yesterday’s question and answer: One of the most successful MLB franchises in baseball history is St. Louis Cardinals. In which year did the Cardinals win their very first World Series title? The answer is 1926. The Cardinals defeated the New York Yankees in the World Series 4-3.