Many professional tennis players wear two pairs of tennis socks during their matches for added thickness. So, yes, tennis players generally prefer thicker socks when they play.
Yes, tennis socks make a huge overall difference to on court performance and movement during matches due to features like moisture-wicking materials and targeted cushioning to improve comfort, durability and foot protection.
Tennis players opt for specialised tennis socks for enhanced performance and comfort during matches, usually crew length for ankle support and compression.