David Bedingham (Durham) and Eathan Bosch (Middlesex)
Bosch was making his debut on the English domestic circuit but did not have the best of outings, scoring 13 not out batting at number at 9 as Middlesex were 430 all out in the first innings.
Durham then replied with a mammoth 567, with Bedingham striking a 147 from 226 balls that included 17 fours and two sixes.
The 32-year-old's century at the Home of Cricket followed up his hundred's against Gloucestershire (118) and Lancashire (129 not out) to start the English season.
Bosch bowled 16 overs in the innings without taking a wicket while going for 78 runs as bad light and rain saw the game eventually ending in a draw.
Kyle Verreynne (Nottinghamshire)
The Proteas wicketkeeper-batter had a quiet outing as defending champions Nottinghamshire secure their second victory in four matches after beating Leicestershire by 10 wickets at Grace Road.
Verreynne only contributed seven but the bulk of the work was done by the top-order as Notts piled on 490 in the first innings.
The gloveman then took three catches as Leicestershire were bowled out for 308 before the hosts were bowled out for 254 in their follow-on innings.
The Nottinghamshire openers then had no trouble knocking off the required target of 73 runs for victory.
Codi Yusuf (Hampshire)
The seamer took only one wicket against visitors Glamorgan at the Rose Bowl as Hampshire slumped to their third defeat in four games this season.
Yusuf finished with figures of 1-82 in 22 overs as Glamorgan piled on 536-7 declared in their first innings.
The home side were then bowled out for just 214 - with Yusuf scoring 18 batting at number 10 - before fairing slightly better in the follow-on innings being 253 all out but could not avoid a bid defeat.
Kyle Verreynne and David Bedingham, who were at the crease when the Proteas hit the winning runs in the WTC final, both scored centuries in the latest round of English County Championship fixtures.
Proteas internationals Simon Harmer and Codi Yusuf both ended up on the losing side in the third round of the English County Championship that only included four fixtures.
David Bedingham was the star Proteas international on show in the second round of the English County Championship, hitting a century in Durham's mammoth victory against Gloucestershire.
There were a few Proteas internationals on show as the English domestic first-class season got underway, with spinner Simon Harmer starring with bat and ball for Essex.
