Ahead of Wednesday's first Ashes Test in Cardiff, Root expressed his disappointment by posting two messages on Twitter.
Trailing 1-2 in the series, India have some concerns with most batsmen not showing enough flexibility at different batting positions.
Australian captain Michael Clarke made his expected declaration overnight and then his bowlers worked their way through the South African batting line-up to dismiss them for 287 and claim an overall lead of 207 runs.
Michael Clarke remained unbeaten on 161, one of the more heroic of his 27 Test hundreds, as Australia reached 494 for seven before rain brought an early tea on the second day of the series-deciding third Test against South Africa on Sunday.
AB de Villiers has resigned as South Africa's Test captain, opening the way for childhood friend Faf du Plessis to take over on a permanent basis.
Fast bowler Anrich Nortje, wicketkeeper/batsman Rudi Second and spin bowling all-rounder Senuran Muthusamy have been included in the 15-man squad that will be captained by Faf du Plessis.
India displace SA off perch to become No 1 team in ODIs
South Africa pace spearhead Dale Steyn has not allowed a series-ending injury to prevent him from backing his captain Faf du Plessis over allegations of ball tampering, suggesting Australia are using the incident as an excuse for losing. Du Plessis was charged with ball tampering on Friday after Australian television pictures showed him applying saliva to the ball with a sweet in his mouth during the second test, which South Africa won to clinch the series with a match to spare. The International Cricket Council (ICC) could ban Du Plessis from one test match if he is found guilty, putting him in doubt for next week's third test in Adelaide.
Photos from Day 2 of the 3rd Test match played in Nagpur on Thursday
Part-time spinner Dean Elgar ripped through India's batting line-up with four wickets as South Africa made the hosts rue their decision to bat first on the opening day of the first Test in Mohali, on Thursday.
Dale Steyn is all set to go out all guns blazing in Melbourne, when South Africa takes on India in World Cup Pool B match.
South Africa slid to 105 for six on the third day of the second and final test against New Zealand on Monday but were still firmly in command at Centurion, holding a 372-run lead. After bowling the Kiwis out for 214, the hosts did not enforce the follow-on as the pitch is getting more and more difficult for the batsmen. New Zealand's bowlers took six wickets in the last session of the day with only stand-in opener Quinton de Kock (50) offering any resistance as Stephen Cook, Hashim Amla, JP Duminy, captain Faf du Plessis and Stiaan van Zyl went cheaply.
The Pretoria wicket is likely to be similar, with perhaps not the same sideways movement of Newlands, and will provide another test of the Indian batsmen's bravery against a seam bowling barrage.
It's less than a year since he made his debut, in the first Test against India at Mohali, but Kagiso Rabada has emerged South Africa's leading cricketer. The 21-year-old fast bowler was named South African's youngest ever Cricketer of the Year and also scooped up five other awards at a gala hosted by Cricket South Africa.
Statistical highlights of the second ODI between India and Sri Lanka, on Mohali on Wednesday.
The Proteas are yet to reach the summit clash of the World Cup, having been knocked out at the semifinal stage four times.
The visitors won the first two matches of the series in Durban and Centurion by six and nine wickets, respectively, dismantling the home side with consummate ease.
South Africa retained the iconic Reliance ICC Test Championship mace and with it won a cash award of $500,000 following its 2-0 series win over the West Indies in Cape Town on Tuesday.
South Africa removed the West Indian openers in Sunday's last session at Newlands to build on AB de Villiers' superb century and take the initiative in the final Test.
Earlier, South Africa England swung the bat to declare on 313-8 at tea on the fourth day, a taking huge lead of 491 runs.
South Africa have now lost five Tests in a row, including two shock home losses to Sri Lanka, and are struggling with on-field know-how to dig themselves out of tough situations.
Australian opener David Warner and veteran fast bowler Ryan Harris have moved up to career-high positions in the ICC Test player rankings following their impressive contributions in Australia's series-winning third Test defeat of South Africa in Cape Town.
A lacklustre Delhi Daredevils suffered an embarrassing 10-wicket defeat following a pathetic batting show during which they were shot out for just 67 runs by Kings XI Punjab, in Mohali, on Sunday.
Images from Day 3 of the first Test between South Africa and Australia in Durban on Saturday.
The visitors reached 49 for 1 at stumps after Bumrah's 5/54 that helped them bowl out South Africa for 194 in their first innings.
Desperate to get their campaigns back on track, the two bottom placed teams in the Indian Premier League -- Kings XI Punjab and Royal Challengers Bangalore -- lock horns in Mohali on Monday, aiming to keep their winning momentum going to stay afloat in the ninth edition of the T20 league.
South Africa have been traditionally weak against spinners.
"It was tough up front, the Sri Lanka bowlers didn't give us much to work with," Markram told reporters.
Fast bowler Dale Steyn took four wickets as South Africa seized control of the first Test against Sri Lanka on Day 2 and went to the close on 126 for four, an overall second innings lead of 170 runs.
Gujarat Lions skipper Suresh Raina, Mumbai Indians spinner Harbhajan Singh and Sunrisers Hyderabad pacer Bhuvneshwar Kumar have got a place in former Australian skipper Ricky Ponting's Best XI of Indian Premier League 2017.
Swing bowler Vernon Philander sent a strong message to the South African one-day international selectors about his prowess in the 50-over game with a superb performance as the Proteas defeated Pakistan by four wickets in the final match of the series in Centurion on Saturday.
Dean Elgar made the most of being dropped early in his innings to score his seventh Test century and anchor South Africa's 229 for four at the close of play on the opening day of the first Test against New Zealand in Dunedin on Wednesday.
South Africa were 224 for six at the close of play in a chilly Dunedin with a lead of 191 runs entering the final day on a pitch that is turning but offering little assistance for the pace bowlers and is proving difficult to score from.
Images from Day 4 of the second Test between South Africa and Australia in Port Elizabeth on Monday.
Ajinkya Rahane rallied India with a gutsy, unbeaten 89 as India's much-vaunted top-order failed yet again on the opening day of the fourth Test against South Africa at the Feroz Shah Kotla, in Delhi, on Thursday.
Under-fire Mahendra Singh Dhoni marked his return to form with an unbeaten 92 as India recorded a 22-run victory over South Africa in the second One-Day International to level the five-match series 1-1 at the Holkar Cricket Stadium, in Indore, on Wednesday.
Vernon Philander and Kagiso Rabada claimed four wickets each as South Africa ripped out Sri Lanka for 110 on the second day of the second Test.
Virat Kohli (fourth), Shikhar Dhawan (seventh) and Mahendra Singh Dhoni (ninth) have also maintained their respective positions in the ICC ODI batting chart.
South Africa have named uncapped batsman Theunis de Bruyn in their injury-hit squad for the three-match home Test series against Sri Lanka that starts on December 26.
In a three part series, Rajneesh Gupta highlights all the important numbers from cricket World Cups held between 1975 to 2015.