Lucas Pouille, Mirza Basic and Roberto Baena win ATP 250 Montpellier, Sofia and Quito events respectively. Barely heard of the latter 2 and they have a combined 2 Grand Slam appearances between them.
Serena and Venus paired up for the USA's doubles rubber against Netherlands in the Fed Cup but lost 6-2 6-3. The match was academic as USA already had an unassailable 3-0 lead, but Serena looked very unfit apparently and many think her planned singles return at Indian Wells in 3 weeks is a bit ambitious.
Gabi Taylor won another $25k event in Australia without dropping a set. 10 win in a row now and is up to about 240 odd in the rankings - hopefully can slightly improve that in the coming weeks and sneak in to the French Open qualifying places by cut off - bound to be in Wimbledon main draw wildcard contention as well now, hopefully ahead of Robson.
Doha is the main (and only) WTA event this week, a Premier 5 event so plenty of points to play for. Konta has an Australian Open rematch against qualifier Pera in her first round match on Tuesday, but they are in a tough quarter with Wozniacki, Kerber and Sharapova. 3 ATP events, the main one in Rotterdam (500) where Federer will reclaim #1 (the oldest ever) should he reach the semi finals. Kyle Edmond plays in the Argentina Open where he has drawn the aforementioned Baena in the first round and there's also a 250 event in New York - Cameron Norrie had entered qualifying for this, but unfortunately lost in the first Q round to compatriot Liam Broady who is now one win away from the main draw.
It will be decided by lots. It's seeded and it looks like GB won't be seeded so likely to play one of the first 4 nations
Russia
Ukraine
Spain
Canada
GB
Paraguay
Japan
Lativa
A home tie to Canada would be ideal. They've had 4 successive away ties at this stage and it's something like 1993 when they were last at home so not sure on venue, but would depend on the surface they chose. I'd consider going if it was Manchester or Glasgow.