Usual terms and conditions apply.
Feel free to pick 5 players from the two countries (a mix of the two, or 5 from one country - it's up to you), and two reserve players just in case one of the chosen 5 does not play. The first reserve player picked will come into contention first.
Scoring
Batting
1 point per run.
+10 for a score of 50.
+10 for every further increment of 50 scored.
If a batsman is not out after 50 = +10, after 100 = +15, after 200 = +25 etc....
Fielding
10 points per catch or stumping
20 points per run out, or 10 points each, if two players share the responsibility
10 bonus points for 3 contributions with catches,stumpings or run outs
Bowling
20 points per wicket
2 points per maiden over
+10 for 5 wickets in the match
+20 for 5 wickets in an innings
+30 for 10 wickets in the match
+50 for 10 wickets in an innings
+30 for a hat trick
Squads can be foun here - https://www.espncricinfo.com/series/new ... 202/squads
