We explain the key metrics, team news and odds in football, tennis, basketball and ice hockey.
Vectorstack is an independent sports analytics project covering football, tennis, basketball and ice hockey.
We are not a bookmaker and we do not sell tips. Our content is educational and written for adults.
Good analysis is about probabilities, not certainties. We show our reasoning so you can judge it yourself.
How much you stake matters as much as what you pick. A few simple rules keep betting under control.
Every preview follows the same disciplined steps.
Results, advanced statistics and schedules for both sides.
Injuries, suspensions, rest and confirmed lineups.
Surface, venue, travel, weather and motivation.
Turn the evidence into our own view of each outcome.
See where our view differs from the bookmaker odds.
Publish the reasoning, not just a pick.
Decimal, fractional or American — the format changes, the meaning does not. Here is how to convert between them.
| Format | Example | Meaning |
|---|---|---|
| Fractional | 6/4 | Win 6 for every 4 staked |
| Decimal | 2.50 | 10 staked returns 25 in total |
| American | +150 | Win 150 for every 100 staked |
| Implied probability | 40% | 1 ÷ 2.50 = 40% |
P = 1 ÷ decimal oddsBookmaker margin — example two-way market (e.g. tennis or a moneyline)1 ÷ 1.62 + 1 ÷ 2.30 = 105.2%Everything above 100% is the margin: here 5.2%. A bet has value only when your own estimate of the probability is higher than the implied probability.The same approach — data plus context — applied to the specifics of each sport.
We track xG, home and away splits and team news. A single injury in defence can shift a match more than league position.
Surface, serve and return numbers and fatigue from previous rounds. Head-to-heads matter more in tennis than in team sports.
Pace, offensive and defensive rating and rest days. Back-to-back games and travel have a measurable effect on results.
Starting goaltender, power-play and penalty-kill efficiency and shot quality. Goalies can change a game on their own.
Serve and reception efficiency, rotations and set-by-set momentum. Strong servers decide tight sets.
Starting pitchers, bullpen fatigue and park factors. One pitching change can flip the odds.
A short list of the numbers we trust most, and why.
| Metric | Sport | Why it matters |
|---|---|---|
| Rest days | All sports | Fatigue from tight schedules is one of the most underrated factors. |
| Offensive / defensive rating | Basketball | Points scored and allowed per 100 possessions. |
| Save percentage | Ice hockey | The share of shots a goaltender stops. |
| Surface record | Tennis | Clay, grass and hard courts reward very different styles. |
| Home / away splits | All sports | Travel and crowd support affect results in every sport. |
| Power play % | Ice hockey | How often a team scores with a man advantage. |
The same idea can have a different name — and different rules — in each sport.
| Market | Sport | How it works |
|---|---|---|
| Set betting | Tennis | Predict the exact score in sets, e.g. 2–0 or 2–1. |
| Point spread / handicap | Basketball, football | One side gets a virtual head start to balance the match. |
| 1X2 | Football | Home win, draw or away win in 90 minutes. |
| Totals (over / under) | All sports | Whether the combined score is above or below a line. |
| Puck line | Ice hockey | A fixed handicap of 1.5 goals. |
| Player props | Basketball, football | Points, rebounds, shots or goals for a single player. |
Quick answers to common questions.
No. Most bettors lose over time. Treat betting as paid entertainment and only stake money you can afford to lose.
It is the chance of an outcome expressed by the odds: 1 ÷ decimal odds. Odds of 1.25 imply 80%, odds of 4.00 imply 25%.
No. We are not a bookmaker. This website publishes analysis and educational material for information only.
A handicap that gives the underdog a virtual head start. The favourite must win by more than the spread.
It depends on your country. Only use bookmakers licensed where you live and always check the minimum age.
Betting is for adults only and always involves the risk of losing money. Our content is for information and entertainment and is not financial advice. If gambling is causing you problems, free and confidential help is available: