[spireitematt]

January

Snooker - Masters - Ronnie O'Sullvian
Tennis - Australian Open Men's Champion - Novak Djokovic

February

Rugby Union - 6 Nations Winner - England
Superbowl - Winner - Green Bay Packers

March

Football - League Cup Winners - Manchester City
University Boat Race Winner (men's) - Oxford

April

Golf - Masters - Bubba Watson
Snooker - World Champion - Mark Williams

May

Football - Women's FA Cup Winner - Arsenal
Football - FA Cup Winner - Manchester United
Football - Scottish FA Cup Winner - Rangers

June

Tennis - French Open Men's Champion - Rafael Nadal
Football - Champions League Winner - Liverpool

July
Football - 2020 Euro's winner - England
Tennis - Wimbledon Men's Champion - Juan Del Potro
Tennis - Wimbledon Women's Champion - Sabine Lisicki
Golf - The Open Winner - Tiger Woods

August

Summer Olympics - Tokyo 2020 - How many gold medals for GB? - 16
Rugby League - Challenge Cup Winner - St Helens

September

Tennis - US Open Men's Champion - Roger Federer
Golf - Ryder Cup Winners - Europe

October

Rugby League - Super League Winner - Castleford

November

Cricket - ICC World T20 Cup Winners - Australia
Tennis - Davis Cup Winners - Great Britain

December

Snooker - UK Championship Winner - Judd Trump
F1 World Champion - Sebastian Vettel

I added Euro 2020's Amelia because you forgot that.