Day 13: Tips and prediction for Brazil and Cristiano Ronaldo plus free bets and bonus sign-up offers

Brazil and Portugal have already qualified for the World Cup knockout stages. Uruguay, Ghana and Serbia also feature on Friday. SunSport are on-hand to preview Day 13 of the competition. They will bring you their best bets, sign-up offers and exclusive bonuses from their partners.

Ghana take on Uruguay at Qatar's Al Janoub Stadium on Friday. Uruguay's path to the last 16 is to defeat Ghana in their final match and hope that South Korea fail to beat Portugal. Sky Bet customers can claim £40 in free bets.

Sky Bet customers can claim £40 in free bets.

Ghana, Uruguay, South Korea and Portugal are playing on Day 13. Cameroon and Brazil are also playing. Serbia is playing Switzerland.

Day 13 features Ghana vs Uruguay, South Korea vs Portugal, Cameroon vs Brazil, Serbia vs Switzerland and Serbia v Switzerland.

Grosvenor Sport customers who stake £10 will get double the odds on any bet.

Portugal have already advanced to the last 16 of the World Cup. South Korea need to beat Portugal to stand any chance of progressing. New Ladbrokes customers can claim £20 in free bets when they stake a fiver.

New Ladbrokes customers can claim £20 in free bets when they stake a fiver.

Cameroon play Brazil. Brazil are already through. Cameroon need to win to keep alive their qualification hopes. If Cameroon win and Serbia beat Switzerland, Cameroon have a slight advantage with a better goal difference. New Betfair customers will receive £30 in free bets when they stake £10 on football.

Day 13 offers tips and prediction for Brazil and Cristiano Ronaldo. New Betfair customers will receive £30 in free bets when they stake £10 on football.

Bet UK customers will receive £30 worth of free bets and bonuses when they stake £10 on World Cup football. Sporting Index will give £20 in free bet with any World cup fixture. Sky Bet will offer £40 in bets for new customers. Paddy Power customers who stake up to £ 20 will get it back as CASH. Betfair will gift new clients £ 30 in cash for each bet they make.

Serbia and Switzerland are playing a friendly match. Switzerland won against Brazil. Serbia needs to win to advance. Coral offers a fiver bet on a draw and a £20 bonus for new customers.

Day 13 includes tips and prediction for Brazil and Cristiano Ronaldo. New Coral customers who stake a fiver will receive £20 in free bets.

Bet UK offers £30 in free bets for new customers. Sky Bet offers free bet stakes for football. Sporting Index offers a £20 off on first £10+ bet. Paddy Power offers cash back on sportsbook markets. Grosvenor Sport offers double odds on any bet for its new clients. Gambling problems can be helped by the National Gabbling Helpline. For confidential support call the helplines on 0808 8020 133 or on www.gamstop.co.uk. The National Gamblers' Association recommends the Begambleaware.org website.

Establishes time and monetary limits before playing. Only gambles with money they can afford to lose. Never chase their losses.