Entities mentioned:
- Aryna Sabalenka: Ambition, Competitive spirit, Pride
- Markéta Vondroušová: Self-preservation, Professional pride, Disappointment
- Jessica Pegula: Ambition, Determination, Professional pride
- US Tennis Association: Duty, Professional pride, Obligation

Article Assessment:
Credibility Score: 85/100
Bias Rating: 50/100 (Center)
Sentiment Score: 45/100
Authoritarianism Risk: 15/100 (Strongly Democratic)

Bias Analysis:
The article presents a balanced view of the tournament events, giving equal attention to players from different countries. It relies on factual reporting of match outcomes and player statements without apparent favoritism.

Key metric: International Sporting Performance

As a social scientist, I analyze that this article highlights the competitive nature of international tennis and its impact on US sporting performance. The withdrawal of Vondroušová due to injury demonstrates the physical demands of high-level tennis and the importance of athlete health management. Sabalenka's advancement to the semifinals without playing may give her a physical advantage, potentially improving the chances of a non-American winning the tournament. Conversely, Pegula's strong performance represents a positive indicator for US tennis, potentially boosting national morale and inspiring future American athletes. The article also underscores the unpredictable nature of sports competitions and how external factors like injuries can significantly influence outcomes, affecting national sporting metrics and international standings.