Some good news for Ranked Battle fans. This is a server-side update. On September 18, we will release a small update, which should eliminate long queues in ranked battles. Because of this, some servers will be unavailable. Timetable: RU 4,5,6 and 8 were updated this afternoon. Overnight RU1 + RU7 will be down from 04:20–04:40 (МSK). RU9 and RU10 from 03:00–03:20 (МSK).
EU1 server was updated from 14:40 – 15:00 CEST (that explains the downtime this afternoon). I suspect EU2 will be down overnight but WG EU gives no information. Nor so far does WG NA.