Tesla is a big company that makes electric cars. They sold more cars than other companies like Ford and GM last year in the U.S. But there are some new companies that could be a problem for Tesla soon. One of them is from South Korea, called Hyundai and Kia. They make cool electric cars too and want to sell many of them all over the world. Another company is Rivian, which made a special kind of electric car like an SUV. These new companies are trying hard to catch up with Tesla and maybe even beat them in selling electric cars. Read from source...

- The author does not provide any data or evidence to support the claim that Tesla is most worried about Rivian and Hyundai.
- The author uses vague terms like "surprising contenders" and "lurking in the shadows" to create a sense of urgency and AIger for Tesla, without actually showing any threat.
- The author compares apples to oranges by mixing sales numbers from different brands under an automaker, while ignoring Tesla's dominance as a single brand with the highest EV sales in the U.S.
- The author focuses on the past performance of Rivian and Hyundai, without considering their future prospects and challenges in the highly competitive EV market.
- The author fails to acknowledge Tesla's advantages in technology, innovation, brand recognition, customer loyalty, and global presence, which give it a strong edge over its rivals.