Cryptic crossword No 3,123

Across

1. Old protocol, one that divides court after returning to replay the point (6)
2. Report what's at civic centre? It's your turn (5,3)
3. Send thumbs down emoji, perhaps, concerning passage of play (5)
4. Extraordinary Li Na, winning 1000 to become consistent (5)
5. Luddite's response to mechanical beats? (6)
6. Spooner's adolescents recoil at means of getting high? (9)
7. After culmination of retirement, Nadal starts as seed? Not quite (5)
8. Serena's No 1, so I claim anarchic ideology? (9)
9. Kafelnikov's positive about mistake with passport: context is everything for him, philosophically (7)
10. A swimming pool gas is suffocating, expect beginners' excuse (9)
11. Showing flexibility, digs into musical retrospective (8)
12. Mixed doubles - where Lenglen and Chatrier courted? (5)
13. Chutzpah after low point shots sent way too high (9)
14. Tense Safina to play loudly - out! Replaced by queen or empress (7)

Down

1. Executed each dive shot (8)
2. Maybe Madeleine's dodgy ace goes over Kvitova's head (4)
3. Notepaper and pen produced electronic duo (4,4)
4. Mischievous Murray - final lost for 0 (6)
5. E.g. Why did the website default the match? 503 Server Unavailable (3-5)
6. Dissenting voices wrongly say players clashed, essentially (4)
7. Sustaining loss, Alcaraz showing part of the tongue (7)
8. Stir up a green salad (6)
9. Run behind, receiving slice from Edberg, making a meal of this? (6)
10. Location of singles, Chlorine in Monte Carlo covers this country on telly (7)
11. Sinner nearly climbing to top of tour, playing this ... (6)
12. ...not to mention disrupted lesson (2,4)
13. Indefinite articles, revealing performances (8)
14. Triumph at the French for Graf and Agassi? (6)