statistics - What does the superscript used in tennis scores mean

In the score below, what do the 7 and 4 superscripts mean in the first set?

Tennis Scoring System Explained - Perfect Tennis

Tennis set betting odds and statistics

Basics SpringerLink

Investigation Into the Potential Value of Stratospheric Balloon Winds Assimilated in NOAA's Finite‐Volume Cubed‐Sphere Global Forecast System (FV3GFS) - Lukens - 2023 - Journal of Geophysical Research: Atmospheres - Wiley Online Library

Progressive shifts in the gut microbiome reflect prediabetes and diabetes development in a treatment-naive Mexican cohort

Thermodynamic Modeling of the Advanced Geothermal System Using Inclined Well Applications - ScienceDirect

Frontiers Comparing Different Typologies of Physical Activities With a Focus on Motivation

A late-stage assembly checkpoint of the human mitochondrial ribosome large subunit

How Do You Keep Score in Tennis? - Forest Crest Athletic Club

Towards multi‐agent reinforcement learning‐driven over‐the‐counter market simulations - Vadori - Mathematical Finance - Wiley Online Library

Inside the Rating Scores: A Multilevel Analysis of the Factors Influencing Customer Satisfaction in the Hotel Industry - Tijana Radojevic, Nemanja Stanisic, Nenad Stanic, 2017

5-oxoETE triggers nociception in constipation-predominant irritable bowel syndrome through MAS-related G protein–coupled receptor D