Heads-up Match-ups in Hold’em
In this lesson, we’re going to run through a number of heads-up match-ups that will help give you an idea of where you stand in a variety of pre-flop situations when playing hold ’em.
Be aware that we’ll focus only on individual hand match-ups. When playing hold ’em, you must put your opponent on a range of hands, rather than specific holdings. However, knowing the odds of common pre-flop match-ups is a good starting point.
Pick out and study what will help you. While these statistics don’t have to be committed to memory, it won’t hurt you if you do.
Let’s start by looking at hand match-ups when holding a pair:
Pair vs. Pair

The higher pair is an 80 percent favourite. We can get very technical and highlight the fact that if the underpair didn’t have any clean suits and/or the maximum number of straight outs then the high pair’s equity would increases by one or two percent.
Pair vs. Overcards

This is the classic coin flip hand that you’ll see many times late in tournaments with one player being all-in. The term coin flip indicates an even money situation which is really a 55 to 45 percent situation, as the pair is a slight favourite.
Pair vs. Undercards

In this situation the pair is normally about a 5-to-1 favourite and can vary depending on whether the two undercards are suited and/or connectors.
Pair vs. Overcard and an undercard

The pair is about a 70 percent favourite. Another example of this holding would be J-J against A-9. The underdog non-paired hand has three outs while the favourite has redraws.
Pair vs. Overcard and one of that pair

The classic example of this situation is the confrontation between a pair of cowboys and big slick. The A-K has three outs and it becomes a 70-30 percent situation or a 2.3-to-1 dog for the cowboys. This is a far cry from the next situation where even though one of the pair is matched the other card is lower.
Pair vs. Undercard and one of that pair

The non pair has to hit its undercard twice or make a straight or flush to prevail. The pair is better than a 90 percent favourite or slightly better than 10-to-1 odds. I’ll take those odds anytime.
Pair vs. Lower suited connectors

You see this match-up late in tournaments when a player is getting desperate and pushes all-in with middle suited connectors. A hand such as Q-Q against 7-6 suited would be a prime example. The pair is a strong favourite to win.
Pair vs. Higher suited connectors

Here is the real coin flip situation. A pair of eights heads-up against a suited Q-J is a fifty-fifty proposition. The higher suited cards would have an edge against a lower pair, such as 2’s or 3’s, since the board itself can sometimes destroy little pairs.
Common Non Pair Match Ups
The following heads-up confrontations contain no pairs.
Two high cards vs. Two undercards

The two higher cards are usually a 65% favourite to win, but it can vary depending on whether any of the cards are suited and/or connectors.
High card, low card vs. Two middle cards

In this match-up the high card gives it the edge. But it’s only a marginal winner, approximately 57% to the hand containing the high card.
High card, middle card vs. Second highest, low card

The edge is increased by around 5% when the low card becomes the third highest card, as shown in this example, which gives approx 62% to 38% for high card/middle card combination.
High card, same card vs. Same card, low card

In this example the A-J is in a very strong position. If we discount any flush or straight possibilities, it only leaves the player holding J-8 with three outs (the three remaining 8’s).
Same high card, high kicker vs. Same card, low kicker

The high kicker gives this hand a fairly big edge. It’s very common for A-K run into A-Q, A-J, and lower, and it’s why Ace-King is such a powerful hand, particularly at the business end of no-limit hold’em tournaments when people move all-in with any sort of Ace.
Statistical Variations
For the mathematically inclined readers who crave precision, it’s worth noting that the figures presented here are rounded and don’t account for every nuance—such as ties, backdoor straights, or flushes. What truly matters for players is understanding the general statistical match-up, not obsessing over whether a pair of eights versus suited Q-J is 50.61% to 48.99%. In practical terms, that’s a fifty-fifty proposition.
More significant than quibbling over fractions of a percent is recognizing that, in most heads-up confrontations, you are rarely a prohibitive underdog. That balance is part of what makes poker both challenging and exciting. While this doesn’t mean you should ignore the math and play recklessly, it does highlight that sound mathematical reasoning underpins every good poker decision. Consistently pushing your chips in with the worst of it will inevitably lead to loss.