The action is starting to pick up as European football seasons begin to click into gear and there is a host of matches across the continent on Sunday.Here are our best bets for what looks set to be a busy footballing day.BET £10 GET £30 IN FREE BETS WITH TALKSPORT BETBet of the day – Tromso to beat Rosenborg – 11/5Tromso have pushed their way up to second in Norway’s Eliteserien after hitting a patch of storming form and they look set to continue their surge at Rosenborg.Following a 1-0 home defeat to Sandefjord at the beginning of May, they have gone on a run of nine straight league victories, the latest of which was a 3-1 win over Bryne last week.Rosenborg received a confidence boost from a 5-0 Conference League win over Banga from Lithuania on Thursday, but their league form has been patchy.One win from their last six outings has to be a concern and they look vulnerable against a team who have leaders Viking firmly in their sights.Special of the day – St Mirren, AIK, Djurgardens and Mjallby all to win – 6/1A four-team acca appeals with Scottish Premiership St Mirren likely to have too much for Ayr, having beaten Annan Athletic 8-2 in their last League Cup match.It also looks to be an excellent day to be backing favourites in Sweden, starting with AIK, who have won seven of their last nine home matches and should have few problems seeing their way past Oster.Djurgardens have won two of their last three games and look set to have too much for Hacken, while leaders Mjallby have lost just one league match all season and they look unlikely to come unstuck when they defend their unbeaten home record against IK Sirius.Long shot of the day – Bryne to beat Viking & both teams to score – 11/2Those looking to get with a value outsider in Sunday’s fixture list should head back to Norway where leaders Viking have been having a bit of a wobble domestically.They eased those concerns somewhat with a 7-0 Conference League victory over Slovenian side Koper on Thursday, but a trip to Bryne looks like it could provide a few problems following defeats in their last two league games against Bodo/Glimt and Brann.Bryne suffered a 3-1 defeat to Tromso last time out and there are fears that they are unable to reproduce their best efforts against the best teams in the league, but they should still have taken plenty from the fact that they were unbeaten in seven matches before that loss.Gaining three points against the leaders certainly looks to be within their capabilities and there looks a strong chance that there will be plenty of goals in this one.Viking have clearly found their shooting boots in the last week, but they could still come unstuck and backing a home win with both teams scoring could be the way to go, especially as both outfits have netted in six of Bryne last seven matches.BET £10 GET £30 IN FREE BETS WITH TALKSPORT BETtalkSPORT BET OfferSign Up Offer: Bet £10 and get £30 in free bets – CLAIM HERET&Cs: 18+ New customers only. Opt in via mobile or app & bet £10+ on any football market at 2.00+ odds within 7 days. No Cash out. Get 6x £5 Free Bets on selected markets. Free bets expire in 7 days. T&Cs apply, see below. GambleAware.org | Please gamble responsiblyOdds correct at time of publish and subject to change*18+ New customers only. Opt in via mobile or app & bet £10+ on any football market at 2.00+ odds within 7 days. No Cash out. Get 6x £5 Free Bets on selected markets. Free bets expire in 7 days. T&Cs apply, see below. GambleAware.org | Please gamble responsiblyRemember to gamble responsiblyA responsible gambler is someone who:Establishes time and monetary limits before playingOnly gambles with money they can afford to loseNever chase their lossesDoesn’t gamble if they’re upset, angry or depressedGamCare – www.gamcare.org.ukGamble Aware – www.gambleaware.orgFor help with a gambling problem, call the National Gambling Helpline on 0808 8020 133 or go to www.gamstop.co.uk to be excluded from all UK-regulated gambling websites.Commercial content notice: Taking one of the bookmaker offers featured in this article may result in a payment to talkSPORT. 18+. T&Cs apply. gambleaware.org