The first of those takes place this weekend as the Scarlets lick their wounds from an unsuccessful European Champions Cup campaign and the other three Welsh sides assess their progress into the last 16 of the second tier Challenge Cup.
The Dragons - boosted by their win over Newcastle Red Bulls - travel to Ireland to face Munster on Friday night, while the Ospreys host the Lions on the same evening.
On Saturday, there are two home matches for the Welsh sides, with the Scarlets hosting Ulster and Cardiff welcoming Italian visitors, Benetton.
On the football front, Swansea City kick things off on Tuesday night when they are at home to Blackburn Rovers, while Wrexham look to bounce back from defeat to Norwich City, when they welcome Leicester City.
Monday January 19 to Sunday January 25
MONDAY JANUARY 19
HORSE RACING
Lingfield (NH) - Kempton (AW) - Wolverhampton (Evening - AW)
FOOTBALL
Brighton v Bournemouth (Premier League - 8pm)
CRICKET
Afghanistan v West Indies (T20 International - 2.30pm)
DARTS
Saudi Arabia Masters (Day 2 of 3)
TENNIS
Australian Open (Day 2 of 15)
TUESDAY JANUARY 20
HORSE RACING
Leicester (NH) - Newcastle (AW) - Down Royal (NH) - Southwell (Evening - AW)
FOOTBALL
UEFA Champions League (9 games) -
Swansea City v Blackburn Rovers (Skybet Championship - 7.45pm) -
Wrexham v Leicester City (Skybet Championship - 8pm) -
Stevenage v Bolton Wanderers (Skybet League 1 - 7.45pm) -
Grimsby Town v Salford City (Skybet League 2 - 7.45pm) -
Vanarama National League (6 games) -
Denbigh Town v Guilsfield (JD Cymru North - 7.45pm) -
JD Cymru South (2 games) -
Trearddur Bay v Llanrwst United (Ardal North West - 7.45pm) -
Goytre v Abertillery Bluebirds (Ardal South East - 7.30pm)
DARTS
Saudi Arabia Masters (Day 3 of 3)
TENNIS
Australian Open (Day 3 of 15)
WEDNESDAY JANUARY 21
HORSE RACING
Catterick (NH) - Lingfield (AW) - Kempton (Evening - AW)
FOOTBALL
UEFA Champions League (9 games) -
Skybet Championship (3 games) -
Vanarama National League (5 games)
CRICKET
India v New Zealand (T20 International - 1.30pm) -
Afghanistan v West Indies (T20 International - 2.30pm)
TENNIS
Australian Open (Day 4 of 15)
THURSDAY JANUARY 22
HORSE RACING
Huntingdon (NH) - Wetherby (NH) - Southwell (AW) - Gowran Park (NH) - Newcastle (Evening - AW)
FOOTBALL
UEFA Europa League (18 games) -
Lincoln City v Burton Albion (Skybet League 2 - 8pm)
CRICKET
Sri Lanka v England (One-Day International - 9am) -
Afghanistan v West Indies (T20 International - 2.30pm)
TENNIS
Australian Open (Day 5 of 15)
GOLF
Dubai Desert Classic (Day 1 of 4) -
The American Championship (Day 1 of 4)
FRIDAY JANUARY 23
HORSE RACING
Doncaster (NH) - Warwick (NH) - Wolverhampton (AW) - Southwell (Evening - AW) - Dundalk (Evening - AW)
FOOTBALL
Derby County v WBA (Skybet Championship - 8pm) -
JD Cymru North (3 games) -
JD Cymru South (5 games) -
Abergavenny Town v Risca United (Ardal South East - 7.30pm) -
Ardal North West (2 games)
RUGBY UNION
Gloucester v Bath (Gallagher Premiership - 7.45pm) -
Munster v Dragons (URC - 7.45pm) -
Ospreys v Lions (URC - 7.45pm) -
Edinburgh v Bulls (URC - 7.45pm)
CRICKET
India v New Zealand (T20 International - 1.30pm)
TENNIS
Australian Open (Day 6 of 15)
GOLF
Dubai Desert Classic (Day 2 of 4) -
The American Championship (Day 2 of 4)
SATURDAY JANUARY 24
HORSE RACING
Cheltenham (NH) - Doncaster (NH) - Uttoxeter (NH) - Lingfield (AW) - Fairyhouse (NH) - Newcastle (Evening - AW)
FOOTBALL
Premier League (5 games) -
Scottish Premiership (4 games) -
Hull City v Swansea City (Skybet Championship - 3pm) -
QPR v Wrexham (Skybet Championship - 3pm) -
Cardiff City v Stockport County (Skybet League 1 - 12.30pm) -
Newport County v Chesterfield (Skybet League 2 - 3pm) -
Southport v Merthyr Town (National League North - 3pm) -
JD Cymru North (5 games) -
JD Cymru South (3 games) -
Ardal North East (8 games) -
Ardal North West (6 games) -
Ardal South East (4 games) -
Ardal South West (5 games)
RUGBY UNION
Gallagher Premiership (4 games) -
Scarlets v Ulster (URC - 3pm) -
Cardiff Rugby v Benetton (URC - 7.45pm) -
URC Championship (3 other games) -
Top 14 French League (6 games) -
Cardiff v Ebbw Vale (SRC Cymru - 4.25pm) -
Super Rygbi Cymru Cup (4 games) -
WRU Premiership (2 games) -
WRU Championship East (4 games) -
WRU Championship West (5 games) -
WRU Division 1 East (3 games) -
WRU Division 1 East Central (4 games) -
WRU Division 1 North (5 games) -
WRU Division 1 West Central (3 games) -
WRU Division 1 West (4 games) -
WRU Premiership Cup Semi-finals (2 games) -
WRU Championship Cup Semi-finals (2 games) -
WRU Division 1 Cup Quarter-finals (4 games)
CRICKET
Sri Lanka v England (One-Day International - 9am)
TENNIS
Australian Open (Day 7 of 15)
GOLF
Dubai Desert Classic (Day 3 of 4) -
The American Championship (Day 3 of 4)
SUNDAY JANUARY 25
HORSE RACING
Fontwell (NH) - Sedgefield (NH) - Naas (NH)
FOOTBALL
Premier League (4 games) -
Scottish Cup Premiership (2 games) -
Portsmouth v Southampton (Skybet Championship - 12pm) -
Abertillery Bluebirds v Canton (Ardal South East - 2pm) -
Welsh Women's Premier League (4 games)
RUGBY UNION
Clermont v La Rochelle (Top 14 French League - 8.05pm)
CRICKET
India v New Zealand (T20 International - 1.30pm)
TENNIS
Australian Open (Day 8 of 15)
GOLF
Dubai Desert Classic (Day 4 of 4) -
The American Championship (Day 4 of 4)
