Betting on Underdogs Explained


Betting on underdogs can be rather satisfying and as colorful as the story behind the term – underdog.

Dating back to the late 19th century when it signified a losing dog in a stigmatized practice of dog fighting, underdog now stands for a team that is unlikely to beat the firm favorite in a contest.

Underdogs are those lower-quality sides bookmakers are betting against by placing high-priced odds on. Backing the favorites is deeply rooted within the psychological aspects of betting and sports in general which state there is a universal mentality which pushes the public to root for favorites.

Going against the strong wind by backing the underdogs is therefore not only fun and daring, but it can be quite rewarding.

Fav vs Underdog

How to Bet on Underdogs?

The worst thing you can do and the biggest mistake you can make with betting on underdogs is to bet randomly, without a clear-cut system and a sound strategy that will help you maximize potential winnings.

A refined strategy for betting on underdogs is hard to create, but the most crucial aspect that can improve your underdog betting chances significantly is finding betting value. This particular thing, like many others in life, have knowledge as its key.

Understanding that underdogs come in various forms and shapes, which are quite different from one sport to another, is crucial. An underdog in football and an underdog in tennis, in the most popular example, are two different categories and betting on those must be approached from a different perspective.

Football vs Tennis

Speaking from a football perspective, punters need to analyze the stats, head-to-head records, squad quality, and form, but should never neglect the psychological aspect. Let’s say we have Premier League giants pitted against a Championship outfit in the FA Cup – a competition known for surprises and upsets.

We need to have in mind that lowly teams rarely head into these games with pressure on their shoulders as they play for the fun of it and for the pure joy. Adrenaline plays a great role here as these teams have nothing to lose and give all to beat their more illustrious opponents. On the other side, favorites are expected to deliver and the expectancy can be their enemy in this regard, which is why they tend to fail. It is up to you to recognize value, potential and pounce for it.

When it comes to tennis, things can be a bit different. In order to recognize the true value of an underdog, punters need to do their homework. All of you who plan to bet on tennis should gain extensive knowledge of the game, preferably on low-ranked players who are pushing their way into the ATP Series from Challengers and Futures. Some bookies tend to disregard such players and diminish their true value which can be significant for a knowledgeable bettor.

This comes to play best when we have an established top-100 tennis player playing against a – let’s say – Grand Slam qualifier and especially when the two players haven’t met before. With high-value betting odds disregarding the underdog’s true value, it might be a good choice to back him/her early in the competition, when motivation, stamina, and morale are at their best.

Best 10 New Bookmakers

£30 SIGN UP HERE

18+ New customers only. Place a £10+ bet at min odds 1/1 (2.0) within 14 days of sign-up. Get £30 in Free Bets, valid for 7 days on selected bets only. Free stake not returned with winnings. T&Cs apply. BeGambleAware.org

£40 SIGN UP HERE

New customers only. Register 9–12 Apr 2026. Bet £/€5 at 2.0+ within 7 days to qualify. Get £/€10 Tote Credit + £/€10 Free Bet within 48h. First bet counts; void bets don’t. 7-day expiry. 18+. Selected customers. T&Cs apply. Gambleaware.org.

10 SIGN UP HERE

100% Casino Bonus up to £100 (new players only), £10 min deposit, no max cash out, 40x wagering, £5 max bet with active bonus, eligibility restricted for suspected abuse, cashback unrestricted, Skrill & Neteller excluded, T&Cs apply. Free bet min odds 2.0; free bet value deducted from winnings.

£10 SIGN UP HERE

18+ New Customers only. Place a £10+ bet at min odds 1/1 (2.0). Get £10 in Free Bets, valid for 7 days and must be used on acca with min 5 selections and min total odds of 2.0. Free stake not returned with winnings. Use code ACCA10 on signup. Bangers N'Cash rewards are a separate promotional scheme and must be opted into during the weekly promotional period via the BetWright Rewards Section T&Cs apply. GambleAware.org.

£20 SIGN UP HERE

T&Cs apply. 18+ New customers only. You must place a £10+ single or multi bet. Min odds of 1/2 (1.50). Money back as £20 in free bets, 1 per account. Free bets credited by 5pm the day after your qualifying bet settles. Excludes specials, bet builders & cashed-out bets don’t count. Must use code B10G20 when creating an account.

£10 SIGN UP HERE

*#ad. 18+. Gamble Responsibly. Gambleaware.org. New customers only. £10 in real money. Bets placed on sports at odds of 2.00 ore more to qualify. Bets must be placed 24 hours within of registration. £10 free bets must be wagered on sports. Cashback is cash without restrictions. - Full Terms Apply

£50 SIGN UP HERE

18+ New players only. Opt-in and £20+ deposit required. Get a 100% bonus up to £50 on your first deposit. Use on sports bets at 1.75+ odds (excludes virtuals, boosts, handicap & DNB). Bonus and deposit carry 5x wagering; only bonus funds contribute. Valid 30 days. Affordability checks & T&Cs apply. BeGambleAware.org.

£40 SIGN UP HERE

New customers: Deposit £10+ within 7 days and place a sports bet. Get 4 x £10 Free Bets (2 x £10 Bet Builders & 2 x £10 Sports Bet). Valid 7 days. Min odds apply. Excludes virtual sports, esports and non-UK/IE horse racing. 18+. T&Cs apply.

£10 SIGN UP HERE

18+ | New UK customers only. Place a £20+ bet with minimum 3 legs, min 2/1 and receive a £10 Free Bet. The Free Bet will be credited once your qualifying bet settles. Free Bet expires 7 days after being awarded. BeGambleAware.org | T&Cs & Maximum Payouts apply.

£20 SIGN UP HERE

New BetTom customers only, 18+. Register from 11/06/2026 and enter code WELCOME20 in My Bonuses. Place a £10+ bet at odds of 2.0+ within 24 hours of registration and receive 4 x £5 free bets (£20 total). Includes 1 Standard, 2 Bet Builder and 1 ACCA free bet. Free bets expire after 7 days. Sportsbook only. Minimum odds and wagering conditions apply. Cashed-out bets do not qualify. Full T&Cs apply. Please gamble responsibly.

Read More