Angelique Kerber is a professional tennis player and former world No. 1 from which country?

Introduction / Context:
Angelique Kerber is a prominent name in women's professional tennis. She has reached the world number one ranking and has won multiple Grand Slam singles titles. Sports general knowledge questions often ask about the nationality of famous players, and this question focuses on which country Angelique Kerber represents.

Given Data / Assumptions:

• Angelique Kerber is a top level professional tennis player.
• She has been ranked world number one on the Women's Tennis Association tour.
• The options list four nationalities: German, American, French and Swiss.
• We are asked to identify her country of representation in international tennis.

Concept / Approach:
Kerber has long been associated with German tennis. She has represented Germany in Fed Cup competitions and at the Olympic Games. Media coverage of her Grand Slam victories, such as titles at the Australian Open, US Open and Wimbledon, routinely describes her as a German player. There is no major ambiguity regarding her sporting nationality.

Step-by-Step Solution:
Step 1: Recall Angelique Kerber's appearances in Grand Slam finals and her national flag during trophy ceremonies.Step 2: Note that she competes under the German flag and is reported as a German tennis player.Step 3: Compare this with the options: German, American, French and Swiss.Step 4: Identify “German” as the only option that matches her known nationality.Step 5: Select German as the correct answer.

Verification / Alternative check:
Player profiles on official tennis websites and major sports news outlets introduce Angelique Kerber as a German tennis player. Her participation for Germany in team events such as the Fed Cup and her representation of Germany in the Olympic Games further confirm this. There is no record of her playing for the United States, France or Switzerland.

Why Other Options Are Wrong:

• American: She has played many tournaments in the United States but does not represent America in international tennis.
• French: She has competed in the French Open but is not a French player.
• Swiss: This option may remind students of famous Swiss players such as Roger Federer or Stan Wawrinka, but it does not apply to Angelique Kerber.

Common Pitfalls:
Sometimes candidates confuse Kerber with other players of different nationalities or assume that players who train abroad represent that country. Another possible confusion is between Kerber and other top women's players like Serena Williams (American) or Martina Hingis (Swiss). A clear memory hook is to link Angelique Kerber with German tennis history and to remember that she is often mentioned alongside other German players such as Steffi Graf as part of Germany's strong tennis tradition.

Final Answer:
Angelique Kerber is a professional tennis player from Germany, so the correct option is “German”.